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How do I disarm air bag to puy new heater core in

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Disconnect battery wait 2-3 mins pull fuses for air bags out then disconnect air bag plugs (yellow) in that order you will have no issues just reverse to hook back up

Posted on Nov 14, 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

2 Answers

How to replace heater core in 2012 dodge avenger

Lotta work - need to remove dashboard to get to heater core - and before disconnecting heater core hoses you have to remove all coolant from car by draining radiator and opening heater valve to full heat. Remove core, replace with new one and reverse other operations. Make sure to properly refill radiator so there are no air pockets that will restrict coolant flow.

Nov 08, 2015 | Dodge Cars & Trucks

1 Answer

How do I replace a heater core on a '91 oldsmobile regency 98

  1. Disarm the air bags (See Disarming below)
  2. Disconnect the negative battery cable.
  3. Disconnect the heater hoses from the heater core.
  4. If equipped with electronic climate control, perform the following procedures:
    1. Disconnect the wires and the hose from the programmer.
    2. Remove the programmer linkage cover and linkage.
    3. Remove the programmer mounting bolts and the programmer.
  5. Remove the heater core cover and heater core assembly.
To install:
  1. Install the heater core assembly and heater core cover.
  2. If equipped with electronic climate control, perform the following:
    1. Install the programmer mounting bolts and the programmer.
    2. Install the programmer linkage and linkage cover.
    3. Connect the wires and the hose to the programmer.
  3. Connect the heater hoses to the heater core.
  4. Connect the negative battery cable.
  5. Fill the cooling system. Start the engine and allow to come to normal operating temperature and check for leaks. Check coolant level after the engine has cooled down.
  6. Check the climate control system for proper operation.
  7. Refer to the Air Bag section at the beginning of this Section, and arm the Air Bag system.


  1. Disconnect the negative battery cable and isolate the cable end with high-quality electrical tape.
  2. Allow at least 30 minutes to expire prior to entering the interior of the vehicle. The sir system is designed to maintain sufficient energy to deploy the air bag for a short period of time even after battery voltage has been cut off.
  3. Remove the `ir' (1990 Ninety Eight) or `sir' (all others) fuse from the interior fuse panel below the left side of the instrument panel.
  4. Except on 1990 Ninety Eight, remove the left side sound insulator, and remove the Connector Positive Assurance (cpa) lock from the yellow 2-way sir harness connector at the base of the steering column, then disconnect the connector.

  1. If equipped, connect the yellow 2-way sir connector at the base of the steering column and insert the Connector Positive Assurance (cpa) lock.
  2. If removed, install the left side sound insulator.
  3. Install the `ir' or `sir' fuse in the fuse panel.
  4. Connect the negative battery cable.
  5. Enter the vehicle from the passenger side and do the following:
    1. For 1990 vehicles only-Turn the ignition switch to the run position and observe the supplemental inflatable restraint lamp on the instrument cluster. The lamp should remain lit for 5-15 seconds, and then go out. If the lamp does anything else, have the system checked.
    2. For 1991-93 vehicles-Turn the ignition switch to the run position and observe the supplemental inflatable restraint lamp on the instrument cluster. The lamp should flash 7, 8, or 9 times, then stay off. If the lamp does anything else, have the system checked.



Feb 14, 2015 | Oldsmobile Cars & Trucks

1 Answer

I have all the functions of the a/c and the associated operations of the dashboard doors when selected, except. no heat whatsoever when selected. The heater core is hot when the engine is @ normal temp....

Hi, this problem is caused by failure of the blend door actuator or structural failure of the door itself. First, access the actuator as instructed below. Have someone turn the key on and change the temperature setting while you watch the actuator. If the actuator turns, odds are the door hinge has failed. In this case, the heater box must be removed from the truck and split open to repair the door.
If the actuator does not move, it may have failed. Remove the actuator and check it for stripped gears or plug it back in and see if it will turn at all when the temperature control is changed. You might also want to check for voltage at the connector before buying a new actuator. A new actuator is about $40.

  1. Disarm the air bag system as explained below.
  2. Open the glove compartment to access the passenger air bag module bolts.


    Fig. Passenger air bag module view

  3. Disconnect the passenger air bag module electrical connector
  4. Remove the two passenger air bag retaining bolts.
  5. Disconnect the passenger air bag module electrical connector.
  6. Placing one hand in the glove compartment, push the passenger air bag module out and remove it.
    WARNING Do not handle the passenger air bag module by grabbing the edges of the deployment doors.
  7. Remove the defroster opening grill.

  1. Fig. Defroster grill view

  2. Detach and position the RH demister hose aside.
  3. On vehicles with anti-theft/keyless entry, remove the screws and position the anti-theft/keyless entry module aside.
  4. Working through the opening near the RH defroster nozzle, remove the screw.
  5. Disconnect the electrical connector.
  6. Remove the screws and the temperature blend door actuator.
  7. To install, reverse the removal procedure. Tighten the air bag module bolts to 71 inch lbs. (8 Nm).


Fig. Temperature blend door actuator view

Disarming the Airbag System

  1. Turn all vehicle accessories OFF.
  2. Turn the ignition switch to OFF.
  3. At the smart junction box (SJB), located below the RH side of the instrument panel, remove the RH lower cowl trim panel and remove the restraints control module (RCM) fuse from the SJB. For additional information, refer to the Owner-s Manual.
  4. Turn the ignition ON and visually monitor the air bag indicator for at least 30 seconds. The air bag indicator will remain lit continuously (no flashing) if the correct RCM fuse has been removed. If the air bag indicator does not remain lit continuously, remove the correct RCM fuse before proceeding.
  5. Turn the ignition OFF.
    CAUTION To avoid accidental deployment and possible personal injury, the backup power supply must be depleted before repairing or replacing any front or side air bag supplemental restraint system (SRS) components and before servicing, replacing, adjusting or striking components near the front or side air bag sensors or RCM, such as doors, instrument panel, console, door latches, strikers, seats and hood latches.
  6. To deplete the backup power supply energy, disconnect the battery ground cable and wait at least one minute. Be sure to disconnect auxiliary batteries and power supplies (if equipped).
  7. Disconnect the battery ground cable (14301) and wait at least one minute.

Aug 23, 2011 | 2006 Ford Ranger

1 Answer

Can you show me a video on how to put in heater core for 1996 Nissan Maximal

What i have is the steps on how to put or replace the heater core. hope this will help you.

the core is located behind the steering column, meaning you mainly need to remove that. On more recent cars, the whole dashboard needs removal.

Older Models

Shut off power to the Maxima, especially the air bag system. Disconnect the negative battery terminal and wait at least 3 minutes for the air bag to lose energy.

rain the engine coolant from the cooling system. Use a clean container if you plan on reusing the coolant.

Disconnect the heater hoses from the heater unit inside the engine compartment. Remove the blower and cooling unit from the interior and then the steering member assembly. Remove the heater unit and the core from the unit.

Install the new core into the heater unit and reconnect the unit in the car. Connect the steering member, cooling unit and heater hoses.Refill the cooling system and connect the battery cable.

Newer Models

Unplug the negative battery terminal. Wait 3 minutes for the air bag system to lose power. Drain the engine coolant into a clean container.

Disengage the air bags from both sides of the car. Remove driver's bag by removing the steering wheel's lower and side lids and the Torx bolts from the wheel sides. Disconnect the passenger bag electrical connector from inside the glove box.

Disassemble the instrument panel. Remove all components and screws from the panel, then have an assistant help lift and remove the panel itself.

Disconnect the following heater, defroster and ventilation ducts on the rear and sides. Remove the heater housing and the heater core from the housing.

Reinstall the heater housing with the new core installed. Replace all ducts, the instrument panel and the air bags.

fill the cooling system and reconnect the battery cable. Let the Maxima

Dec 04, 2010 | Nissan Maxima Cars & Trucks

1 Answer

Needto replace heater core in 99 ford taurus,need help

Instructions Things You'll Need:
  • Replacement heater core
  • Clean container
  • Wrench
  • Screwdriver
  • Steering wheel nut
  1. Disconnect the negative battery cable and wait at least one minute for the air bag system to lose power. Make sure the front wheels are straight ahead and lock the steering column.

  2. Detach the air bag module by removing the bolts from underneath both sides of the steering wheel and the electrical connector. Remove the steering wheel bolt and press the wheel away from the steering column. Remove the lower steering column cover.

  3. Insert a 1/8-inch wire or pin punch in the shroud hole under the ignition switch while it's in the "Run" position. Press on the pin and pull on the ignition switch lock cylinder to remove it.

  4. Disassemble and remove the instrument panel from the Taurus' interior. This includes the radio and all panels, electrical connectors, harnesses and screws. You'll need an assistant to help you lift and remove the instrument panel.

  5. Drain the engine coolant from the cooling system, using a clean container for reuse. Remove the heater hoses, actuator and metal cover from the heater. Disengage the spring from the heater core cover and the lever.

  6. Depress the locking ramp and remove the lever from the secondary air temperature control (the lever is brittle, so don't bend it). Remove the primary air conditioning air temperature control door shaft from the pin.

  7. Remove the heater core cover and seal from the heater/air conditioning housing assembly. Remove the heater core from the heater/air conditioning housing by pressing on the core tubes and assembly.

  8. Installation
  9. Install the replacement heater core to the heater/air conditioning housing. Install the core cover, seal, lever, spring, metal cover, actuator and heater hoses.

  10. Replace and assemble the instrument panel with your assistant's help. Connect the steering wheel (use a new bolt to connect it to the column), air bag and negative battery cable.

  11. Refill the cooling system with either the old coolant or new. Start the Taurus' engine and let it reach normal operating temperature. Watch the climate control operation and check for any leaks.

Read more: How to Replace the Heater Core in a Ford Taurus '

Oct 21, 2010 | Ford Taurus Cars & Trucks

1 Answer

How do you remove a heater core in a 2003 kia sorento?


Jun 22, 2010 | 2003 Kia Sorento

3 Answers

I need to replace the heater core in my 2001 for f

Have a look at this.

Lots of nice to know stuff on an otherwise all day heater core change. Pay attention to the notes on NEW o'ring sizes and what screws to keep together.

Jan 22, 2010 | 2001 Ford F150 Styleside SuperCrew

2 Answers

Im trying to figure out if my heater core is under the hood or inside the truck under the dash in my 1998 s 10

this under the dash you have to dismantle the board and this is a case where the heter and evaporator air conditioning, good luck fan.thanks

Jan 09, 2010 | 1998 Chevrolet S-10 Pickup

1 Answer

Heater core broken

All of it don't try this at home unless you are experienced.
  1. Disable the Supplemental Inflatable Restraint (SIR) system, refer to Disabling the Supplemental Inflatable Restraint (SIR) System. See: Body and Frame\Interior Moulding / Trim\Air Bag(s) Arming and Disarming\Service and Repair
  2. Negative battery cable.
  3. Drain cooling system.
  4. Raise vehicle.
  5. Drain tube from heater case.
  6. Heater hoses from heater core.
  7. Lower vehicle.
  8. Right and left sound insulators.
  9. Steering column opening filler.
  10. Floor air outlet duct.
  11. Heater core cover.
  12. Heater core mounting clamps and remove heater core.

Nov 19, 2008 | 1995 Chevrolet Beretta

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