Question about 1996 Mercury Grand Marquis

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96 grand marquis dome and door ajar is on and door is shut

How do I turn off inside switch or stop car door from reading in the system cause the door is obviously closed

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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SOURCE: 1998 Grand marquis

had same problem. the switch for the light is in the door handle mechinism. I sprayed all four door latchs with wd 40. turned out it was one of the back doors. hope this helps

Posted on Apr 02, 2009

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smartr10U
  • 1305 Answers

SOURCE: 1999 Mercury Sable Dome Light won't shut off

Next to the headlight switch is a dimmer dial for the interior dash lights... if you turn it all the way up, the interior lights remain on... there is a "detent" on the dimmer. turn the interior dash lights all the way full on ...you'll feel the detent, then turn it down back past the detent a little bit...that should cancel the interior courtesy lights... wait a bit because the interior lights are sometimes on delay timers....
good luck let me know what happens.

Posted on May 09, 2009

  • 2 Answers

SOURCE: door locks 2003 grand marquis ls stopped working

check fuse

Posted on Jun 05, 2009

dmsr63
  • 2050 Answers

SOURCE: door ajar light, drivers door

Its on the pillar, part of the main body, not the door itself. Usually close or under where thedoor latch meets the stricker. It may have a small rubber boot on it (They do go bad, and are fairly cheap)

Posted on Jun 29, 2009

  • 3 Answers

SOURCE: The automatic climate control system in my 96

my ac will only blow hot air.. i need a digital climate control reset code for my 1996 mercury grand marquis..

Posted on Aug 12, 2011

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1 Answer

My door latch on my 97 grand marquis is messed up. I finally got the door to close but interior lights still on


You will need to replace the door latch and the door ajar (turns on the light inside the car) switch that is mounted to the latch inside the door.

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Dome light inside 2009 mercury marquis won't go off. What can I do?


Common Mercury problem, a sticking door ajar switch inside one of the door latches. Get you some WD40 and spray inside all the door latches making sure you use a good amount on each, operate each quite a bit, 5-10 times to let the WD40 work on each. This should take care of the problem. Repeat if you need to get results.

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Anti theft system wont turn off unless i slam driver door over and over again or slam it really hard?


You need to remove the door panel and replace the door ajar switch that is part of the door latch inside the door, they are very troublesome switches.

Jun 14, 2012 | 2000 Mercury Grand Marquis

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When I am driving my door ajar light on the dash cycles on and off and my dome light stays on. Also when my car is parked and my doors are locked the alarm and lights cycle on and off on there own. I am...


Hello
Ford uses a tiny micro switch that is mounted on the door latch inside the door to turn on the dome light and provide door ajar sensing, the switches get water in them and this causes them to not make a good connection, it is a very common problem, i have replaced dozens of them at my dealer. Have the switches tested by the dealer, they do it with a electronic system scanner that can ID which of the 4 door switches is acting up.

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96 grand marquis... my interior lights (dome and doors) stay on after car is started and wont turn off until about 10 minutes after I stop the engine/turn the vehicle off. Doors seem fine (have not...


The first thing is that this car has an auto shut down, if it sees any lights on it shuts them down after a while, this is why they are shutting off, i think you are correct with the door switch, the most common one is the driverdoor switch, its a small push type switch on the latch asm as you know, i would start with the driverside door, i would almost bet thats the bad one, as afr as the headlight switch try unplugging it and see if light goes out but some models operate throught the switch but most dont so if its the dimmer switch then the light should go out when disconnected. good day.

Jun 14, 2011 | 1996 Mercury Grand Marquis

1 Answer

I have a 2000 Pontiac Grand Am and the interior stay on


Interior Lights Circuit Description
By using a feature called inadvertent power control, the body control module (BCM) supplies power to all of the following components:
• The courtesy lamps
• The dome lamps
• The rear view mirror reading lamps
• The instrument panel compartment lamp
• The rear compartment lamp
The left front door ajar switch turns the interior lamps on through the BCM by grounding CKT 394. When the left front door is open, the switch is closed. This condition provides a ground and a door open input to the BCM. The BCM then grounds the following lamps through CKT 156 in order to turn the lamps on:
• The courtesy lamps
• The dome lamp
• The rearview mirror lamps
The right front door ajar switch and the rear door ajar switches turn the interior lamps on by grounding CKT 395 from the BCM.
When the ignition key is removed from the lock cylinder, the interior lamps remain on for approximately 40 seconds.
The BCM provides an interior lamps-on delay after a door is opened. The lamps remain on for approximately 40 seconds or until the ignition switch is turned to the ON position. The 40 second lamps-on delay reduces to 4 seconds if a door is opened within 2 minutes of the ignition switch being moved from the ON position. The interior lamps immediately turn off when the vehicle begins to move.
The dome lamp OFF-DOOR-ON switch controls the dome lamp. When the switch is in the OFF position, the dome lamp remains off. When the switch is in the DOOR position, the dome lamp lights when a door is opened by the BCM grounding CKT 156. When the switch is in the ON position, ground is supplied through CKT 750. The rear view mirror reading lamps are controlled by the rear view mirror reading lamps switch or through CKT 156 from the BCM.
Voltage is supplied at all times to the BCM through the INT LPS fuse. The BCM supplies voltage to the interior lamps through CKT 1732.

Battery Run Down Protection
When the ignition switch is in the OFF position, the BCM turns off the power to all of the interior lamps after 18-22 minutes.
The BCM will reset the inadvertent power control relay output when one of the following actions is performed:
• Open or close a door.
• Turn the ignition switch to the ON position.
• Turn off any interior lamps that may be on.
• Press the power door lock switch/keyfob button.
• Press the decklid release keyfob button.

Courtesy or Dome Lamps Always On
Step
Action
Yes
No
1
Did you perform the Lighting Systems Diagnostic System Check?
YES - Go to Step 2
NO - Go to Diagnostic System Check - Lighting Systems
2
Use the Scan Tool in order to command the courtesy lamps OFF.
Do the courtesy lamps turn OFF?
YES - Go to Step 4
NO - Go to Step 3
3
Test for a short to ground in the courtesy lamps control circuit (156). Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?
YES - System OK
NO - Go to Step 7
4
Test for a short to ground in each door jamb switch circuit:
• Circuit 394-Driver door
• Circuit 395-Passenger door(s).
Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?
YES - System OK
NO - Go to Step 5
5
Test each door jamb switch for proper operation. Refer to the following:
• Open switch with the door closed
• Closed switch with the door open
Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find a malfunctioning door jamb switch?
YES - Go to Step 6
NO - Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems
6
Replace the malfunctioning door jamb switch. Refer to Door Jamb Switch Replacement in Doors.
YES - Is the repair complete?
NO - System OK
--
7
Important: Perform the set up procedure for the body control module.
Refer to Body Control Module (BCM) Programming/RPO Configuration .
Replace the body control module. Refer to Body Control Module Replacement in Body Control System.
Did you complete the replacement?
System OK
Instal the door jamb switch wire harness.
Install the door jamb switch (2).

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1 Answer

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remove the door switch, clean and reinsert. It switched ground to a black cable, which goes to the PCM.

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check the door ajar switches... most likely one is out of adjustment

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Dome lights intermittently flash on and off in a 1996 Jeep


If it has automatic or a domelight that stays on for a while after you shut the door is on a timer relay and that is probably getting bad. As far as the door ajar message there is a switch in the door jam, look and see if you see it. Take wd40 and try to soak the switch try to get it inside the switch.If its incorporated in the door latch spray back inside the door latch real good. Open and close the door several times and see if it works then.

Nov 24, 2008 | 1996 Jeep Grand Cherokee

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