Question about Mitsubishi Diamante

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Removed dash to replace heater core, plugged all wiring harness back in, now have no headlights, turn signal, wipers, no power to half of main power distribution. possible missing plug on back of headlight switch

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No, there is a control module that plugged in or its plugged in at the wrong module

Posted on Aug 25, 2008

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3 Answers

Looking to replace heater core


Cherokee, Grand Cherokee, 1999-2005

Removal & Installation
  1. Disconnect and remove the negative battery.
    CAUTION After disconnecting the negative battery cable, wait 2 minutes for the driver-s/passenger-s air bag system capacitor to discharge before attempting to do any work around the steering column or instrument.
  2. Drain the cooling system into a clean container for reuse.
  3. Remove the instrument panel by performing the following procedure:
    1. Turn the steering wheel in the straight-ahead position.
    2. Remove the knee blocker from the instrument panel.
    3. Remove the steering column; do not remove the air bag module, the steering wheel or switches from the steering column.
    4. From under the driver-s side of the instrument panel, disconnect the following items:

      Instrument panel wiring harness connector from the 100-way wiring harness connector at the left side of the inner panel. Side window demister hose at the heater/air conditioning housing demister/defroster duct on the driver-s side.
    5. Remove the glove box.
    6. Reaching through the glove box opening, disconnect the following items:

      Two halves of the heater/air conditioning system vacuum harness connector. Instrument panel wiring harness connector from the heater/air conditioning system wiring harness connector. Instrument panel wiring harness connector from the passenger-s side air bag module wiring harness connector. Side window demister hose at the heater/air conditioning housing demister/defroster duct (passenger-s side). Two halves of the radio antenna coaxial cable connector. Two instrument panel wiring harness connectors from the passenger air bag ON/OFF switch wiring harness connector. Passenger-s side air bag ON/OFF switch wiring harness from the retainer clip on the plenum bracket that supports the heater/air conditioning housing just inboard of the fuse block module. Two lower passenger-s side air bag module bracket-to-dash panel nuts.
    7. Remove the upper cover from the instrument panel.
    8. Remove the 3 instrument panel-to-door hinge pillar screws.
    9. Remove the 4 upper instrument panel-to-dash nuts.
    10. Using an assistant, remove the instrument panel from the vehicle.
  4. If equipped with air conditioning, discharge and recover the air conditioning system refrigerant.
  5. Disconnect the refrigerant lines from the evaporator. Plug the refrigerant openings to prevent evaporation.
  6. Disconnect the heater hoses from the heater core tubes.
  7. Disconnect the heater/air conditioning system vacuum supply line connector from the T-fitting near the heater core tubes.
  8. In the engine compartment, remove the 5 heater/air conditioning housing-to-chassis nuts. If necessary, loosen the battery hold-downs and reposition the battery for access.
  9. Remove the cowl plenum drain tube from the heater/air conditioning housing stud; it-s located behind the cylinder head on the cowl.
  10. From the bottom of the heater/air conditioning housing, remove the floor duct.
  11. On the passenger side, remove the heater/air conditioning housing-to-plenum bracket screw.
  12. Pull the heater/air conditioning housing down far enough to clear the defrost/demist and fresh air ducts, then, rearward far enough to clear the mounting studs and the evaporator drain tube to clear the dash panel holes.
  13. Remove the heater/air conditioning housing assembly from the vehicle.
  14. Remove the heater/air conditioning housing upper case.
  15. Lift the heater core from the lower half of the heater/air conditioning housing.
To install:
  1. Assemble the heater core into the lower half of the heater/air conditioning housing.
  2. Install the heater/air conditioning housing upper case.
  3. Install the heater/air conditioning housing assembly to the vehicle.
  4. On the passenger-s side, install the heater/air conditioning housing-to-plenum bracket screw.
  5. At the bottom of the heater/air conditioning housing, install the floor duct.
  6. Install the cowl plenum drain tube to the heater/air conditioning housing stud; it-s located behind the cylinder head on the cowl.
  7. In the engine compartment, install the 5 heater/air conditioning housing-to-chassis nuts.
  8. Connect the heater/air conditioning system vacuum supply line connector to the T-fitting near the heater core tubes.
  9. Connect the heater hoses to the heater core tubes.
  10. Connect the refrigerant lines to the evaporator.
  11. If equipped with air conditioning, evacuate and charge the air conditioning system refrigerant.
  12. Install the instrument panel by performing the following procedure:
    1. Using an assistant, install the instrument panel to the vehicle.
    2. Install the 4 upper instrument panel-to-dash nuts.
    3. Install the 3 instrument panel-to-door hinge pillar screws.
    4. Install the upper cover to the instrument panel.
    5. Reaching through the glove box opening, connect the following items.

      Two lower passenger-s side air bag module bracket-to-dash panel nuts. Passenger-s side air bag ON/OFF switch wiring harness to the retainer clip on the plenum bracket that supports the heater/air conditioning housing just inboard of the fuse block module. Two instrument panel wiring harness connectors to the passenger air bag ON/OFF switch wiring harness connector. Two halves of the radio antenna coaxial cable connector. Side window demister hose at the heater/air conditioning housing demister/defroster duct (passenger-s side). Instrument panel wiring harness connector to the passenger-s side air bag module wiring harness connector. Instrument panel wiring harness connector to the heater/air conditioning system wiring harness connector. Two halves of the heater/air conditioning system vacuum harness connector.
    6. Install the glove box.
    7. Under the driver-s side of the instrument panel, connect the following items:

      Side window demister hose at the heater/air conditioning housing demister/defroster duct on the driver-s side. Instrument panel wiring harness connector to the 100-way wiring harness connector at the left side of the inner panel.
    8. Install the steering column.
    9. Install the knee blocker to the instrument panel.

  13. Connect and remove the negative battery.
  14. Refill the cooling system.
  15. Run the engine to normal operating temperatures; then, check the climate control operation and check for leaks.

Hope helps (remember rated this).

Jun 25, 2010 | 2001 Jeep Grand Cherokee

1 Answer

Would like a diagram of the heater core of a 1999 chevrolet blazer


  • Remove the front dash panel by turning the lower screws in a counter-clockwise direction, then unscrewing the single bolt on the lip of the instrument cluster and pulling the panel out. Remove the rear wiper switch and the 4x4 switches, if applicable. Lowering the tilt wheel will allow the panel to be totally removed.
  • Remove the radio, headlight switch module and glove box by turning their screws in a counter-clockwise direction.
  • Remove the main dashboard by unbolting it at the front, between the windshield and firewall. There are six to eight bolts holding it in, and, once they are removed, the dash can be pulled away from the firewall. Be careful not to pull too much, as the wiring harness could become damaged.
  • Drain the coolant system by turning the drain plug on the lower left corner of the radiator and allowing the fluid to fall into the drain pan. Uncapping the radiator can reduce the internal pressure.
  • Remove the heater core hose, on the upper left of the engine bay by pinching their hose clamps with a pair of pliers and pulling them off. Some models will have screw-type hose clamps; turning them counter-clockwise will loosen them. Age and heat may have stuck the hoses to the core nipples, and the hoses can be cut right at these nipples if necessary. Leave enough hose to reconnect the new core.
  • Unbolt the heater core's mounts with a socket wrench in a counter-clockwise direction. Once the bolts are free, the heater core can be maneuvered toward the windshield and slid out. Some coolant may splash out, so have a towel handy.
  • Replace the heater core with a new one by sliding it into place and securing the mounting bolts.
  • Reconnect the heater core's hoses, turn the radiator's drain plug clockwise to close it, then refill the coolant system with a 50/50 percent mix of coolant and water.
  • Reconnect the dashboard to the firewall, then replace the front dash panel and fasten its instrument cluster screw and bottom bolts.
  • Crank up the Jimmy and add coolant until the heater core is filled and blowing hot air.
  • Replace the radiator cap.
Good luck and make sure you have lots of time and use the camera on your phone and take pictures to use as reference.

Jan 18, 2010 | 1999 Chevrolet Blazer

2 Answers

How to change a heater core in a 2001 chevy blazer ls


Sorry, your going to have to remove the dash.
  • Remove the front dash panel by turning the lower screws in a counter-clockwise direction, then unscrewing the single bolt on the lip of the instrument cluster and pulling the panel out. Remove the rear wiper switch and the 4x4 switches, if applicable. Lowering the tilt wheel will allow the panel to be totally removed.
  • Remove the radio, headlight switch module and glove box by turning their screws in a counter-clockwise direction.
  • Remove the main dashboard by unbolting it at the front, between the windshield and firewall. There are six to eight bolts holding it in, and, once they are removed, the dash can be pulled away from the firewall. Be careful not to pull too much, as the wiring harness could become damaged.
  • Drain the coolant system by turning the drain plug on the lower left corner of the radiator and allowing the fluid to fall into the drain pan. Uncapping the radiator can reduce the internal pressure.
  • Remove the heater core hose, on the upper left of the engine bay by pinching their hose clamps with a pair of pliers and pulling them off. Some models will have screw-type hose clamps; turning them counter-clockwise will loosen them. Age and heat may have stuck the hoses to the core nipples, and the hoses can be cut right at these nipples if necessary. Leave enough hose to reconnect the new core.
  • Unbolt the heater core's mounts with a socket wrench in a counter-clockwise direction. Once the bolts are free, the heater core can be maneuvered toward the windshield and slid out. Some coolant may splash out, so have a towel handy.
  • Replace the heater core with a new one by sliding it into place and securing the mounting bolts.
  • Reconnect the heater core's hoses, turn the radiator's drain plug clockwise to close it, then refill the coolant system with a 50/50 percent mix of coolant and water.
  • Reconnect the dashboard to the firewall, then replace the front dash panel and fasten its instrument cluster screw and bottom bolts.
  • Crank up the Jimmy and add coolant until the heater core is filled and blowing hot air.
  • Replace the radiator cap.
Good luck and make sure you have lots of time and use the camera on your cell phone and take pictures to use as reference.

Dec 26, 2009 | 2000 Chevrolet Blazer

1 Answer

Need to replace heater core


big job, dificulty 8 on a 10 scale Heater Air Plenum Chamber Removal
  1. Remove heater outlet floor duct (18C433) as described.
  1. Remove instrument panel (04320). Refer to Section 01-12 .
Instrument Panel SPECIAL SERVICE TOOL(S) REQUIRED Description Tool Number Radio Removing Tool 415-001 (T87P-19061-A)
Removal and Installation
  1. Disconnect battery ground cable (14301).
  1. Remove RF wheel and tire assembly. Refer to Section 04-04 .
  1. Remove three nuts in radiator coolant recovery reservoir area.
  1. Remove bolt retaining front fender apron (16054) to front fender (16005) .
  1. Position front fender splash shield out of the way.
  1. Lower vehicle.
  1. Tag and remove main harness connector from jumper harness (located in front of blower motor).
  1. Remove steering column. Refer to Section 11-04 .
  1. Remove RH cowl side trim panel (02344) and LH cowl side trim panels (02345) .
  1. Tag and disconnect wiring connectors in LH and RH cowls.
  1. Remove ground wire located on LH cowl side.
  1. Remove RH instrument panel upper moulding (04268) and LHinstrument panel moulding (04389) from instrument panel (04320) by pulling away from instrument panel and snapping out of retainers. Disconnect wiring connectors as required.
  1. Remove glove compartment (06010).
  1. Remove instrument panel upper finish panel (044A90) and disconnect the A/C sunload sensor (19E663) and anti-theft indicator, if equipped.
  1. Disconnect the heater water hoses (18472) from the heater core tubes. Plug the ends of the heater water hoses to prevent coolant loss.
  1. Plug heater core tubes securely to prevent coolant leakage from heater core (18476).
  1. Remove one nut retaining the upper LH corner of the A/C evaporator core housing (19A559) to the dash panel (01610) .
  1. Disconnect two vacuum supply hoses from vacuum source. Push grommet and vacuum supply hose into passenger compartment.
  1. Disconnect wiring harness from A/C electronic blend door actuator.
  1. Disconnect the white vacuum hose from the heater and A/C air inlet duct door vacuum control motor (18A318).
  1. Remove nuts from the studs along the lower flange of the heater air plenum chamber (18471).
  1. Disconnect connectors to A/C electronic blend door actuator and electronic module on side of heater air plenum chamber.
  1. Remove heater air plenum chamber by pulling rearward.


Heater Air Plenum Chamber and Air Inlet Duct

8b51d06.gif



Item Part Number Description 1 19C836 Suction Accumulator/Drier 2 56956-S2 Screw (2 Req'd) 3 386877-S36 Screw 4 45445-S36 Nut and Washer Assy 5 19C928 A/C Recirculating Air Duct Screen 6 386877-S36M Screw (2 Req'd) 7 45332-S12 Nut and Washer 8 19B762 A/C Air Inlet Door Inner Seal 9 19C590 A/C Recirculating Air Duct 10 18471 Heater Air Plenum Chamber 11 18C433 Heater Outlet Floor Duct 12 55734-S2 Nut 13 19A559 A/C Evaporator Core Housing 14 45332-S2 Nut and Washer A — Tighten to 2.5-3.2 Nm (23-28 Lb-In)
Installation
  1. Route the vacuum supply hose through the dash panel and seat the grommet in the opening.
  1. Position the heater air plenum chamber under the instrument panel with the A/C register duct opening up and the heater core tubes down. Connect wire harness connector to A/C electronic blend door actuator and electronic module on side of heater air plenum chamber .
  1. Rotate the heater air plenum chamber up behind the instrument panel and position the heater air plenum chamber to the dash panel. Insert the heater core tubes and mounting studs through their respective holes in the dash panel and the A/C evaporator core housing.
  1. Install three nuts on the studs along the lower flange and one on the upper flange of the heater air plenum chamber.
  1. Install three nuts below the windshield wiper motor (17508) to retain the LH end of the heater air plenum chamber to the dash panel.
  1. Install one nut to retain the upper LH corner of the A/C evaporator core housing to the dash panel .
  1. Connect the white vacuum hose to the heater and A/C air inlet duct door vacuum control motor.
  1. Connect the vacuum jumper harness to the plenum harness at the multiple vacuum connector near the heater outlet floor duct. Install heater outlet floor duct.
  1. Connect the sensor tube to the evaporator case connector on EATC-equipped vehicles.
  1. Connect vacuum supply hose to vacuum supply.
  1. Unplug the heater core tubes and connect the heater water hoses to the heater core tubes.
  1. Fill the cooling system with coolant to replace coolant lost during removal of the heater air plenum chamber.
  1. Install heater outlet floor duct as described.
  1. Install instrument panel. Refer to Section 01-12 .


Section 12-03A: Air Conditioning System—Manual A/C-Heater 1998 Crown Victoria, Grand Marquis Workshop Manual
REMOVAL AND INSTALLATION Heater Core Removal
NOTE: If a heater core leak is suspected, the heater core must be pressure leak tested before it is removed from the vehicle. Refer to Section 12-00 .

  1. Remove the heater air plenum chamber (18471) assembly as described.
  1. Remove the heater dash gasket (18570) from the heater air plenum assembly.
  1. Remove the four retaining screws from the heater core cover (18B300) and remove the heater core cover from the heater air plenum chamber assembly.


Dec 15, 2009 | Mercury Marquis Cars & Trucks

1 Answer

Do i have to take the dash apart to change the heater core on a s-10 pickup


Sorry, your going to have to remove the dash.
  • Remove the front dash panel by turning the lower screws in a counter-clockwise direction, then unscrewing the single bolt on the lip of the instrument cluster and pulling the panel out. Remove the rear wiper switch and the 4x4 switches, if applicable. Lowering the tilt wheel will allow the panel to be totally removed.
  • Remove the radio, headlight switch module and glove box by turning their screws in a counter-clockwise direction.
  • Remove the main dashboard by unbolting it at the front, between the windshield and firewall. There are six to eight bolts holding it in, and, once they are removed, the dash can be pulled away from the firewall. Be careful not to pull too much, as the wiring harness could become damaged.
  • Drain the coolant system by turning the drain plug on the lower left corner of the radiator and allowing the fluid to fall into the drain pan. Uncapping the radiator can reduce the internal pressure.
  • Remove the heater core hose, on the upper left of the engine bay by pinching their hose clamps with a pair of pliers and pulling them off. Some models will have screw-type hose clamps; turning them counter-clockwise will loosen them. Age and heat may have stuck the hoses to the core nipples, and the hoses can be cut right at these nipples if necessary. Leave enough hose to reconnect the new core.
  • Unbolt the heater core's mounts with a socket wrench in a counter-clockwise direction. Once the bolts are free, the heater core can be maneuvered toward the windshield and slid out. Some coolant may splash out, so have a towel handy.
  • Replace the heater core with a new one by sliding it into place and securing the mounting bolts.
  • Reconnect the heater core's hoses, turn the radiator's drain plug clockwise to close it, then refill the coolant system with a 50/50 percent mix of coolant and water.
  • Reconnect the dashboard to the firewall, then replace the front dash panel and fasten its instrument cluster screw and bottom bolts.
  • Crank up the Jimmy and add coolant until the heater core is filled and blowing hot air.
  • Replace the radiator cap.
Good luck and make sure you have lots of time and use the camera on your cell phone and take pictures to use as reference.

Dec 14, 2009 | 1998 Chevrolet S-10 Pickup

1 Answer

I have a 97 chevy s10 4.3 v6 4x4. my heater core went out and i was wanting know if there is any way to replace it without taking the whole dash out.


Sorry, your going to have to remove the dash.
  • Remove the front dash panel by turning the lower screws in a counter-clockwise direction, then unscrewing the single bolt on the lip of the instrument cluster and pulling the panel out. Remove the rear wiper switch and the 4x4 switches, if applicable. Lowering the tilt wheel will allow the panel to be totally removed.
  • Remove the radio, headlight switch module and glove box by turning their screws in a counter-clockwise direction.
  • Remove the main dashboard by unbolting it at the front, between the windshield and firewall. There are six to eight bolts holding it in, and, once they are removed, the dash can be pulled away from the firewall. Be careful not to pull too much, as the wiring harness could become damaged.
  • Drain the coolant system by turning the drain plug on the lower left corner of the radiator and allowing the fluid to fall into the drain pan. Uncapping the radiator can reduce the internal pressure.
  • Remove the heater core hose, on the upper left of the engine bay by pinching their hose clamps with a pair of pliers and pulling them off. Some models will have screw-type hose clamps; turning them counter-clockwise will loosen them. Age and heat may have stuck the hoses to the core nipples, and the hoses can be cut right at these nipples if necessary. Leave enough hose to reconnect the new core.
  • Unbolt the heater core's mounts with a socket wrench in a counter-clockwise direction. Once the bolts are free, the heater core can be maneuvered toward the windshield and slid out. Some coolant may splash out, so have a towel handy.
  • Replace the heater core with a new one by sliding it into place and securing the mounting bolts.
  • Reconnect the heater core's hoses, turn the radiator's drain plug clockwise to close it, then refill the coolant system with a 50/50 percent mix of coolant and water.
  • Reconnect the dashboard to the firewall, then replace the front dash panel and fasten its instrument cluster screw and bottom bolts.
  • Crank up the Jimmy and add coolant until the heater core is filled and blowing hot air.
  • Replace the radiator cap.
Good luck and make sure you have lots of time and use the camera on your cell phone and take pictures to use as reference.

Dec 10, 2009 | 1997 Chevrolet S-10 Pickup

1 Answer

Heater core assembly


  • Remove the front dash panel by turning the lower screws in a counter-clockwise direction, then unscrewing the single bolt on the lip of the instrument cluster and pulling the panel out. Remove the rear wiper switch and the 4x4 switches, if applicable. Lowering the tilt wheel will allow the panel to be totally removed.
  • Remove the radio, headlight switch module and glove box by turning their screws in a counter-clockwise direction.
  • Remove the main dashboard by unbolting it at the front, between the windshield and firewall. There are six to eight bolts holding it in, and, once they are removed, the dash can be pulled away from the firewall. Be careful not to pull too much, as the wiring harness could become damaged.
  • Drain the coolant system by turning the drain plug on the lower left corner of the radiator and allowing the fluid to fall into the drain pan. Uncapping the radiator can reduce the internal pressure.
  • Remove the heater core hose, on the upper left of the engine bay by pinching their hose clamps with a pair of pliers and pulling them off. Some models will have screw-type hose clamps; turning them counter-clockwise will loosen them. Age and heat may have stuck the hoses to the core nipples, and the hoses can be cut right at these nipples if necessary. Leave enough hose to reconnect the new core.
  • Unbolt the heater core's mounts with a socket wrench in a counter-clockwise direction. Once the bolts are free, the heater core can be maneuvered toward the windshield and slid out. Some coolant may splash out, so have a towel handy.
  • Replace the heater core with a new one by sliding it into place and securing the mounting bolts.
  • Reconnect the heater core's hoses, turn the radiator's drain plug clockwise to close it, then refill the coolant system with a 50/50 percent mix of coolant and water.
  • Reconnect the dashboard to the firewall, then replace the front dash panel and fasten its instrument cluster screw and bottom bolts.
  • Crank up the Jimmy and add coolant until the heater core is filled and blowing hot air.
  • Replace the radiator cap.
Good luck and make sure you have lots of time and use the camera on your phone and take pictures to use as reference.

Dec 10, 2009 | 1999 GMC Jimmy

3 Answers

Do you have to remove whole dashboard on 96 gmc jimmy to remove and replace heater core?or can you do everything from underneath the glove box?


  1. Remove the front dash panel by turning the lower screws in a counter-clockwise direction, then unscrewing the single bolt on the lip of the instrument cluster and pulling the panel out. Remove the rear wiper switch and the 4x4 switches, if applicable. Lowering the tilt wheel will allow the panel to be totally removed.
  2. Remove the radio, headlight switch module and glove box by turning their screws in a counter-clockwise direction.
  3. Remove the main dashboard by unbolting it at the front, between the windshield and firewall. There are six to eight bolts holding it in, and, once they are removed, the dash can be pulled away from the firewall. Be careful not to pull too much, as the wiring harness could become damaged.
  4. Drain the coolant system by turning the drain plug on the lower left corner of the radiator and allowing the fluid to fall into the drain pan. Uncapping the radiator can reduce the internal pressure.
  5. Remove the heater core hoses, on the upper left of the engine bay, by pinching their hose clamps with a pair of pliers and pulling them off. Some models will have screw-type hose clamps; turning them counter-clockwise will loosen them. Age and heat may have stuck the hoses to the core nipples, and the hoses can be cut right at these nipples if necessary. Leave enough hose to reconnect the new core.
  6. Unbolt the heater core's mounts with a socket wrench in a counter-clockwise direction. Once the bolts are free, the heater core can be maneuvered toward the windshield and slid out. Some coolant may splash out, so have a towel handy.
  7. Replace the heater core with a new one by sliding it into place and securing the mounting bolts.
  8. Reconnect the heater core's hoses, turn the radiator's drain plug clockwise to close it, then refill the coolant system with a 50/50 percent mix of coolant and water.
  9. Reconnect the dashboard to the firewall, then replace the front dash panel and fasten its instrument cluster screw and bottom bolts.
  10. Crank up the truck and add coolant until the heater core is filled and blowing hot air.
  11. Replace the radiator cap.
The Jimmy uses a coolant-heated radiator core mounted in the dashboard to provide heated air into the passenger compartment. This heater core can become clogged and leak, as it is usually the lowest point in the coolant system and debris settles into it. Replacement of the heater core will take the average of about two hours to complete. Good luck

Nov 19, 2009 | 1996 GMC Jimmy

1 Answer

How to Replace a Heater Core


Removal & Installation

  1. Disconnect the negative battery cable.
    CAUTION After disconnecting the negative battery cable, wait 2 minutes for the driver-s/passenger-s air bag system capacitor to discharge before attempting to do any work around the steering column or instrument
  2. On diesel models, remove the passenger side battery and battery tray.
  3. Remove the instrument panel by performing the following procedures:
    1. Remove the air bag control module (ACM) and bracket from the floor panel tunnel.
    2. Remove the trim from both cowl side inner panels.
    3. Remove the steering column-to-instrument panel opening cover.
    4. Remove the 2 hood latch release handle-to-instrument panel lower reinforcement screws and lower the handle to the floor.
    5. Disconnect the driver-s side air bag module wiring harness connector from the lower instrument panel reinforcement.
    6. Place the wheels in the straight-ahead position and lock the steering wheel. Remove the steering column without disassembling it.
    7. From under the driver-s side of the instrument, disconnect or remove the following items:

      Parking brake release handle linkage rod from the parking brake mechanism located on the left cowl side inner panel. Instrument panel wiring harness connector from the parking brake switch located on the parking brake mechanism. Three wiring harness connectors (body wiring harness, headlight, dash) from the 3 junction block connector receptacles located closest to the dash panel. Head light/dash-to-instrument panel bulkhead wiring harness connector screw and disconnect the connector. Instrument panel-to-door wiring harness connector located directly below the bulkhead wiring harness connector. Infinity sound system wiring harness connector (if equipped), located at the outboard side of the instrument panel bulkhead connector. Stop light switch electrical connector. Vacuum harness connector located near the left side of the heater/air conditioning housing.
    8. Under the passenger-s side of the instrument panel, disconnect the radio antenna coaxial cable connector.
    9. Loosen both sides of the instrument panel cowl side roll-down bracket screws about 1 / 2 inch (13mm).
    10. Remove the 5 upper instrument panel-to-upper dash panel screws; remove the center screw last.
    11. Roll down the instrument panel and install a temporary hook in the center hole on top of the panel. Attach the other end to the center hole in the top of the dash panel. The opening should be approximately 18 inches (46cm).
    12. Disconnect the instrument panel-to-heater/air conditioning housing assembly wiring harness connectors.
    13. Using an assistant, remove the instrument panel from the vehicle.

  4. If equipped with air conditioning, perform the following procedure:
    1. Discharge and recover the air conditioning system refrigerant.
    2. Disconnect the refrigerant lines from the evaporator. Plug the openings to prevent contamination.
    3. Disconnect the refrigerant lines from the accumulator. Plug the openings to prevent contamination.
    4. Remove the accumulator.

  5. Drain the cooling system into a clean container for reuse.
  6. Disconnect the heater hoses from the heater core tubes.
  7. Remove the PCM from the dash panel and move it aside. Do not disconnect the PCM harness connector.
  8. In the engine compartment, remove the heater/air conditioning housing assembly-to-chassis nuts.
  9. In the passenger-s compartment, remove the heater/air conditioning housing-to-dash panel nuts.
  10. Pull the heater/air conditioning housing assembly rearward far enough to clear the studs and air conditioning drain tube holes.
  11. Remove the heater/air conditioning housing assembly from the vehicle.
  12. Remove the upper-to-lower heater/air conditioning housing screws and remove the upper housing.
  13. Remove the heater core from the lower housing.


    Fig. View of the heater/air conditioning housing assembly


    0900c15280225dc3.jpg enlarge_icon.gifenlarge_tooltip.gif Fig. View of the heater core

Apr 07, 2009 | 1997 Dodge Ram

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