Question about 2001 Cadillac DeVille

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On a 2001 cadillac deville: interior lights stay on

On a 2001 cadillac deville: what would keep the interior lights on? I have checked the dimmer switch and all the door ajar switches.

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Must have a short somewhere or body control module may be defective.

Posted on Jul 03, 2010

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What color are the wires that go from door switch to dome lights on a 2005 mustang v6 conv.


The door switch doesn't go to the dome lights , the switch (door ajar switch ) is an input to the SMJ - smart junction box or body control module take your pick .
Principles of Operation
When the SJB detects a request for lighting, it turns on the interior lamps by supplying power to the lamps. The request for lighting can be an open door signal from a door ajar switch, an interior lighting on command from the instrument panel dimmer switch or an unlock command from a remote keyless entry (RKE) transmitter.
The door ajar switches are hard-wired directly to the SJB. The 2 door ajar switches are normally closed when the doors are closed. The decklid ajar switch is normally closed when the decklid is closed. All door ajar switches receive voltage from the SJB and each has its own ground circuit.
The instrument panel dimmer switch receives a ground signal from the SJB. The instrument panel dimmer switch provides variable resistance for backlighting the instrument cluster and a toggle ON/OFF function for the interior lights.
The RKE receiver is contained inside the SJB. When the SJB receives an unlock request from an RKE transmitter, it unlocks the doors and turns on the interior lamps. There could be DTC'S diagnostic trouble codes stored in the SJB ! You can not access these codes with a OBD2 code reader , need a factory scan tool .
B1319 Driver Door Ajar Circuit Failure Go To Pinpoint Test D . B1327 Passenger Door Ajar Circuit Failure Go To Pinpoint Test D . B2021 Dome Lamp Input Return Circuit Failure Go To Pinpoint Test A . B2550 Dome Lamp Output Circuit Short to Ground Go To Pinpoint Test A . B2554 Dome Lamp Output Circuit Failure Go To Pinpoint Test D . Do you know B-codes -body control .
Your best bet is to take to a ASE certified repair facility or a Ford dealer .

Jan 01, 2016 | 2005 Ford Mustang V6

3 Answers

I have a 2001 ford mustang v-6 that the dome light will not go out when the doors are closed and the key is out ?


My 02 Mustang's light was still on because of the door ajar button. Open the door look at the latch. The latch that goes up and down has a door ajar button hiding near this. It can be hidden by a rubber covering on the side of it. Or you can take the door inner door cover off and try to squirt some oil into the door ajar. You can try oiling it and work it back and forth. Also on the the latches sometimes they dip them in plastic. Mine was loose and would not let the door shut properly. So that was another problem with the light being on. I cut off the pieces that were jamming the latch up.

Oct 15, 2014 | 2001 Ford Mustang V6

1 Answer

Interior lighting stays on


First check your dimmer switch to make sure that you do not have it turned all the way up where it clicks.This is how you turn on your interiors lights in many cars.Second,Make sure there is nothing jamming your doors open,even slightly, and making your interior lights stay on.Third,if none of these are the culprit,check your doors switch inside the jamb where your door swivels out.It may be broken or not operating properly.Check the wiring that is insid the jamb.Many times when and if there is a rubber cover between the jamb and the door,the wiring can break and cause a short.Which in turn grounds out and may cause your lights to stay on or not at all.Hope this helps some;)

Apr 17, 2010 | 2004 Cadillac Deville

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My interior lights came on and never shut off even after shutting off the engine so i just pulled the fuse on my 2001 cadillac deville dts


check your dimmer-you may have accidentally turn the switch on-if not the dimmer switch will need replaced

Feb 17, 2010 | Cadillac DTS Cars & Trucks

1 Answer

My 2002 Cadillac Deville. She had it detailed a short time ago and now the interior lights do no come on when you open a door. The individual lights work when turned on. Is there a control to keep the...


There should be a dimer switch that can turn off the lights. Try and find the dimmer and turn fully one way then the other till you get the lights back on. it could be a twist knob on the turn signal lever/arm or a rolling wheel on the dash by the light switch.

Oct 24, 2009 | 2002 Cadillac Deville

1 Answer

Interior dome lights wont activate wh en doors


If none of the interior door lights work, check the fuse, and check the bulb. If they are both ok, then you may have a bad relay or switch but you will have to trace the wiring which is a pain.

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is the door ajar light on sometimes also when driving? I had a similar problem with the light staying on. I determined that it was the passenger front door latch sticking. I opened the door, then took a screwdriver to push the latch shut on the door jamb. (Make the truck think the door is shut even though it is open). Then lubricate that jamb and pull the handle open to open the door. Keep doing this (closing with screwdriver and opening with handle) until the latch works freely. This took care of my light and door ajar problem.

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1 Answer

Interior lights will not turn off


make sure interior dimmer switch isnt left on.a bad door ajar switch.will cause interior lights stay on.also some cars with BCM it will keep inside lights if it goes bad.

Jul 10, 2009 | 1994 Jeep Cherokee Country

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Cadillac Deville Electrical problem


You could try checking the fuses to see if any are blown, if the fuses are all good then it's possible the door switch is bad or not making a connection from dirt or debris, the door switch is generally located insdie the door at the hinge or its a push button switch, when the door closes it pushes the switch in, the switch may also be jammed in keeping your lights from turning on.

Mar 11, 2009 | 2004 Cadillac Deville

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