Question about Chrysler LHS

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I have '99 LHS and the push button trunk release just quit working. the remote doesn't work either. I checked the fuses/relays under the hood and all the little fuses by the left dash, but everythings good there. Would appreciate any help before going to a mech or the dealer.

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  • Richard Scordino May 11, 2010

    check the solenoid that operates the latch...is there power there when you activate it?

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  • 18 Answers

The body computer controls this and a lot more ,very costly . its located at the right kick pannel ,the wiring harness should be cleaned and the computer board will get corroed from heat ,you may take a brush and clean the pins on the board to see if this helps,if it doed spray the part with a spray to insulate it...

Posted on Oct 25, 2009

  • rwmqe Oct 25, 2009

    the body computer controls this and a lot more ,very costly . its located at the right kick pannel ,the wiring harness should be cleaned and the computer board will get corroed from heat ,you may take a brush and clean the pins on the board to see if this helps,if it doed spray the part with a spray to insulate it...

  • rwmqe Oct 25, 2009

    the body computer controls this and a lot more ,very costly . its located at the right kick pannel ,the wiring harness should be cleaned and the computer board will get corroed from heat ,you may take a brush and clean the pins on the board to see if this helps,if it doed spray the part with a spray to insulate it...

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2008 Cadillac CTS push button to open trunk sometimes works


Do you know anything about automotive electronic's ? The trunk release is controlled by electronic control modules . Having the vehicle check for DTC'S - diagnostic trouble code's should be the first step in the diagnostic procedure . Then reading how it work's !
Factory service repair info.
Rear Compartment Lid Release System Components
• Body control module (BCM)
• Remote control door lock receiver
• Interior rear compartment lid release switch
• Exterior rear compartment lid release switch
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• Trunk release relay

Rear Compartment Lid Release Operation
The interior rear compartment lid release switch receives a signal from the driver door switch assembly (DDSA). When the interior rear compartment lid release switch is activated, the signal circuit is pulled to ground. The DDSA interprets this and sends a GMLAN serial data message to the body control module (BCM) requesting the rear compartment lid be released. The BCM responds by applying battery voltage to the trunk release relay control circuit which energizes the TRUNK RELES relay. The trunk release relay is supplied with battery voltage at all times. With the relay coil energized, the relay switch contacts close allowing battery voltage to flow to the rear compartment lid release actuator causing the rear compartment lid to release. The rear compartment lid release actuator is permanently grounded at G402.

The trunk release relay is located in the rear fuse box located under the back seat.

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What might be wrong with the trunk release on this 2007 Cadillac DTS? (It's not the valet switch)


Which fuse were you checking? There are two fuses in the trunk release circuit - one underhood (ALDL) which feeds the trunk/fuel door release circuits via the valet switch and also the ALDL circuit; and one under the back seat (BODY fuse) for the trunk release.

Unfortunately, relay control signals for these releases run through the IPM (Instrument Panel Integration Module) which handles the release buttons on the dash, and the RIM (Rear Integration Module), which receives these signals from the IPM and handles them and the trunk release button on the keyless remote.

If the fuel door release is working at the dash and the trunk release is not, the ALDL fuse should be OK and the problem may still be with the BODY fuse, trunk release relay or wiring. If that isn't the problem, then I suggest you check for IPM and RIM DTC's (error codes).

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Try checking the fuzes under you hood look for the trunk relay if its not under the hood most likely it will be inside off your car

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Did you check the trunk relese fuse 15amp location rear fuse box . How did you check fuse's an relay's ? Did you use a DMM - digital multi-meter ? Did you check the elcetrical circuit ? Do you know how a relay work's ? The BCM - body control module controls the trunk release relay . Check for B+ voltage at the relay .
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My remote trunk button works but the interior trunk button doesn't any more. Is there a fuse for it? Where would that be? All my fuses look good and I don't see anything labeled for trunk.


Just go under hood, open fuse box and replace the red 10 amp fuse. Its blown. Go in the junction box under the hood, not the one in the cab. If the diagram isnt legible, simply check the little fuses until you find the blown one. Its in the same box as all the relays and the bigger fuses. Theres a few smaller fuses in the junction box that are just like the ones in the cab. Find the blown one, replace and enjoy.

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My trunk won't open, I have tried my trunk button and the key won't work, it worked fine a few hours, but even when i try to do it manually it won't open. Also I would look in and try the...


There are 3 phases to fixing your car's trunk lid release problem.

Phase 1: First check the fuse - once you know that's OK, then proceed to phase 2 (below).
The fuse for the trunk lock is
the bcm (pwr) 15A fuse in the instrument panel fuse box (behind panel at drivers right foot)

Check that fuse, as it is the power supply for the button on the dash that sends power to the actuator in the trunk.

Phase 2: Get the trunk open (without taking it to the dealership).
If you have remote keyless entry to the trunk, you could try that - but with the actuator
dead/dying, it shouldn't work.

Here are a couple of ideas to try to enter trunk while (a) actuator isn't working, and (b) all
valet lockout features (designed to deny valets access to the trunk) are in the "Lock" position:

There is the lock cylinder, which you stated is not functioning - put the key in, and it doesn't
turn. Just to be sure, consider: lubricate key with Graphite lock-type lubricant, and retry.

The trunk has 2 valet safetys...the locking rear seats which require access to the trunk to unlock, and then there is a valet switch in the trunk that locks the button on the dash from working to keep valet parking attendants out of the trunk. That may be in the lock position.

You can try accessing the center area of the fold down rear seat and see if you can unhinge the rear seat from there. Maybe reach in with your hand, or an extension-type tool.

there may be a way to fold the hinge away from the seat back so it can be removed from the hinge and give you access to the safety latch in the trunk and open it that way (white handle in trunk).
The white-handled safety latch release is desiged to prevent accidentally trapping children, and
if you can pull it with your extending-type or grasping-type tool, the trunk will open whether or
not the actuator motor is working.

Phase 3: Replace the Problem part.

Your failed part may be either (1) Trunk Release Relay, or (2) Trunk Lock Release Switch

My Satrun ION manual doesn't cover either of these parts, and the online parts houses, e.g.
http://www.rockauto.com/catalog/x,carcode,1431624,pgname,Electrical-Switch%2B%2526%252338%253B%2BRelay,a,search.yahoo.com%2BSearch%2Bfor%2B2004%2BSATURN
fail to provide instructions. One of those times a mechanic has to t=rely on his/her native
handiness and/or experience.
To identify which of these parts is bad, locae the Trunk Release Relay (call your dealer parts
dept. for helpful tips on finding it), then operate the dashboard trunk release button with your
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