Question about 1994 Ford Mustang

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How do i replace the heater core on a 94 cobra mustang having a hard time with the dash and dont know how to turn off the air bags

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Look in a Chilton manual from Autozone about 10.00 dollars and ill have all this info.

Posted on Oct 02, 2009

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How to remove the heater core on 94 mercury cougar


Removing the Old Core
  • Disconnect the Mercury Cougar's negative battery cable. Remove the center console from the interior. Disarm the car's air bag system and remove the bag's diagnostic monitor and bracket.

  • Take the heater outlet floor duct out of the car. Remove the screw holding the air transfer duct and push it into the outlet duct. Unscrew the screws retaining the outlet duct to the heater core cover and release the retaining tabs on each side to remove the duct.

  • Raise and support the Mercury Cougar, using multiple jackstands. Drain the engine coolant by removing the drain plug on the bottom of the radiator. Replace the drain plug after all the liquid flows into a clean container and disconnect the heater hoses from the core

  • Withdraw the black vacuum supply hose from the vacuum source (you can now lower the vehicle). Disconnect the same hose from the air conditioner's vacuum reservoir tank.

  • Detach the heater core cover that holds the core by releasing the retaining tabs and removing the clips. Remove the dash panel seal, vacuum hose and heater core bracket from the cover.

  • Remove the heater core from the cover and the case seal from the core

Dec 20, 2016 | Mercury Cars & Trucks

1 Answer

Heater core replacement


not changing AF every 2 years, cause the acid build up.
then eats the core to death, a 1 hr job becomes 8 or more...

how hard, well on a range of 1 to 10 , (depends on skills and tools)
a 5?
taking things apart is easy , getting it all back and working , now that is is challenging.
the thing is , the heater box just dont drop out of the dash in most cars with say 2 screws. (i had 1961 truck that did)

but i open the FSM for your car.
and it shows 37 steps out, and 38 back in
here is the out. (minus photos)
quote (partial) (buy the book buy the FSM and read it.....)
  1. Before servicing the vehicle, refer to the Precautions Section. Also see the IMA system disabling before proceeding with any procedure. {DEFEAT THE AIR BAGS or DIE !}
  2. Disconnect the negative battery cable and wait for 3 minutes.
  3. Place the front wheels in the straight ahead position.
  4. Drain the cooling system into a clean container for reuse.
  5. In the engine compartment, open the heater valve cable clamp and disconnect the cable from the heater valve arm. Then, turn the heater valve to the fully opened position.
  6. Disconnect the heater hoses from the heater core.
  7. Remove the heater housing-to-chassis n

  1. Remove the front center floor console.
  2. Remove the glove box
  3. Remove the center lower cover.
  4. Remove the radio.
  5. Remove the steering wheel access cover and disconnect the driver air bag connector.
  6. Remove the steering wheel cover and remove the driver air bag.
  7. Loosen the steering wheel nut, then use a puller and remove the steering wheel.
  8. Remove the steering column covers.
  9. Disconnect the cable wheel connectors and remove the cable reel.
  10. Disconnect the combination switch and ignition switch connectors.
  11. Remove the steering joint pinch bolts.
  12. Remove the steering column attaching nuts and remove the steering column.
  13. Disconnect the passenger air bag connector.
  14. Remove the 3 air bag mounting nuts, then pry carefully with a screwdriver and lift the air bag out of the dashboard.
  15. Remove the A pillar trim on both sides.
  16. From under and behind the dashboard, disconnect and label all electrical connectors.
  17. Remove the driver coin tray.
  18. Remove the dashboard attaching bolts (A) and screws (B) as shown.
  19. Carefully lift up on the dashboard and disengage it from the holders (C) and (D).
  20. Remove the dashboard through the door opening.
  21. Discharge and recover the air conditioning system refrigerant.
  22. In the engine compartment, remove the refrigerant lines-to-evaporator housing bolts.
  23. Separate the lines, discard the grommets and plug the openings to prevent contamination.
  24. Disconnect the evaporator housing's temperature sensor connector.
  25. Remove the evaporator housing-to-chassis screws/nut and remove the evaporator housing.
  26. Disconnect the mode control motor and the air mix control motor electrical connectors and remove the wiring harness clips and the wiring harness from the heater housing.
  27. Remove the heater duct clip, the heater housing-to-chassis nuts and the heater housing.
  28. Remove the heater core cover screws and the cover.
  29. Remove the heater core pipe clamp screws and the clamp.
  30. Remove the heater core from the heater housing.

Nov 22, 2013 | 2001 Honda Insight

1 Answer

Heater core


There's two hoses that run from the front of the engine to the firewall; those tubes sticking out through the firewall are your heater core connections. You'll have to pull the dash out to access the heater core for replacement; once you get the dash out you should be able to figure the rest out.

Aug 02, 2012 | 1989 Ford Mustang

1 Answer

I have a 1998 chevrolet pu 1500 and need to know hou to take out the dash and replace ac coor


http://www.youtube.com/watch?v=u5BUl9R42t0

i would tell you but this video will help you alot more. this video is how i learned to do it. he is working on a 94 but the 98 is basically the same when i did this job on my 97 tahoe i got held up trying to free the passenger side behind the passenger air bag is a metal plate with two or three bolts in it remove the bolts and it will free it. once the dash is out to remove the heater box disconnect the evap core and heater core then remove all screws securing it to the firewall there is one hidden screw on the top side of the box near the evap core it cannot be seen but you can probably reach back there and feel it. if you need more help email me kflets@att.net

Apr 18, 2011 | Chevrolet C1500 Cars & Trucks

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

2 Answers

I have a ford f150 1998 ineed to know if the cover


It comes off from the inside,it can still go off and hurt you so keep your head out of it`s way,if if it is unplugged.

Nov 20, 2009 | 2004 Ford F150

1 Answer

2001 Ford Mustang Cobra air conditioning problem


most fords were built to whenever the air is on to blow air onto the windows as well. most people dont notice it cause its only a partial air. if it is blowing out pretty hard then the most likely cause of that is that the little flap in your air ducting is stuck or the return spring on it has gone bad. hope i helped, good luck with the fix.

Nov 07, 2009 | 2001 Ford Mustang

1 Answer

Dashlights not working-97 mustang gt


sound like a lose wire.take dash back out and check the wires that goes to dash.wires could have move out of place when you removed the dash.

May 26, 2009 | 1997 Ford Mustang Cobra

1 Answer

How to install new sensors on Mustang 1997?


my 94 mustang air bag lite bleeks and i do not no why

Apr 03, 2009 | 1997 Ford Mustang Cobra

1 Answer

1999 Mustang heater problem


The heater/AC temp control blend door is warped and sticking, this is a very common problem in this series of mustang, in order to fix it the dash must be removed.

Nov 17, 2008 | 1999 Ford Mustang Cobra

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