Question about 1991 Buick Regal

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My door lock was broken and caused a short. my battery is being drained due to this short. which is the fuse that controls the power locks so that i can remove it.

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If its shorting then the fuse should have already blown if it was of the correct amperidge

Posted on Jul 07, 2010


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2003 grand marquis ls door locks and trunk not working

Hi, sounds like you may have lost power. Check your fuses, remember, you have fuses in the cab and under the hood. Hope that helps

Oct 10, 2017 | Cars & Trucks

1 Answer

I have a 2005 GMC Yukon that the rear hatch does not lock. Wouldn't be a problem but no manual key hole to lock it. Must be some kind of lock sensor. Is on the driver door panel or by the hatch?

The rear hatch locking is computer contolled .
The BCM also runs diagnostics on the liftgate lock relay control circuit and will set DTC B3825 as current and also send a Class 2 message to the DIC. The DIC will display REPLACE LIFTGATE FUSE to inform the driver that a fault has been detected in the liftgate lock circuit and that the liftgate is not locked. Faults that will set the DTC and cause the DIC to display the message could be any of the following:
• An open ECC fuse
• An open or short to ground in the liftgate lock relay battery positive voltage circuit
• A faulty liftgate lock relay
• An open or short to ground in the liftgate lock relay control circuit
• A short to ground in the liftgate lock actuator lock control circuit
• A faulty BCM

The liftgate lock relay supply and coil sides receive a constant voltage through the battery voltage supply circuit and the ECC fuse. The normally closed contact is connected to ground and the control side is connected to the body control module (BCM). A lock function will occur when a door lock switch activation, keyless entry lock transmission, auto door lock function or a liftgate lock function has been received by the BCM. The BCM will then ground the control side of the liftgate lock relay. This energizes the relay and allows voltage to be applied to the liftgate lock actuator lock control circuit. Since the other side of the liftgate lock actuator is connected to the normally closed contacts of the door unlock relay to ground, the liftgate will lock. When an unlock function occurs the BCM will ground the control side of the unlock relay and the rear doors and liftgate will unlock.
The power door lock system consists of the following components:
• The driver door module (DDM)
• The passenger door module (PDM)
• The body control module (BCM)
• The driver information center (DIC)
• The rear door lock switch
• The door lock relay
• The door unlock relay
• The liftgate lock relay--utility vehicles with liftgate only
• The reversible door lock actuators in each of the doors and liftgate
• LOCKS 20A fuse (rear lock/unlock relay supply voltage)
• ECC 10A fuse (liftgate lock relay supply voltage)

If i were to guess i would say you mite need a new lock actuator , but i don't guess . You could take the hatch inside panel off an check for B+ voltage for the lock actuation as someone pushes the switch . Or have it checked for codes .

Dec 21, 2016 | GMC Cars & Trucks

1 Answer

2002 yukon xl .My locks & alarm system dont work ! What do i do ? I checked fuses also

Power Door Locks Inoperative - All Doors and Switches ?
The MIR/LOCK fuse supplies battery positive voltage for the power mirrors, power door lock switches and the memory seat switch (if equipped). If the MIR/LOCK fuse is open, all systems on the fuse would be inoperative. The fault could be a short to ground in the battery positive voltage circuit, however, a short to ground in the power mirror motor control or the memory seat control circuits could also be the cause if the fuse opens after any of the switches are activated. If a short to ground exists in either the door lock or unlock relay control circuits, a DTC (B3137 or B3147) would set when the BCM commands a lock or unlock function.
Did you perform the Power Door System Diagnostic System Check?
Go to Step 2
Go to Diagnostic System Check - Door Systems


Actuate all door lock switches to both the lock and unlock positions.
Did all the doors lock and unlock?
Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems
Go to Step 3


Did any of the doors lock and unlock from any of the switches?
Go to Power Door Locks Inoperative - One Door or Switch
Go to Step 4


  1. Install a scan tool.
  2. With the scan tool, command the doors to lock and unlock.
Did the doors lock and unlock?
Go to Step 12
Go to Step 5


  1. Remove the door lock relay.
  2. With a test lamp connected to a good ground, test the battery positive voltage circuits for the door lock relay at the fuse block.
Did the test lamp illuminate?
Go to Step 6
Go to Step 13
The Content Theft Deterrent function provides the theft deterrent by sounding the horn and flashing the headlamps and the park lamps when there is an unauthorized vehicle entry or there is tampering detected.
SECURITY Telltale The SECURITY telltale on the instrument cluster is controlled by both the VTD system and the CTD system.
The VTD system commands the instrument cluster to control the telltale only when the ignition switch is ON. The VTD system uses the telltale as a malfunction indicator. If a DTC is present in the VTD system when the ignition is ON, the telltale will be illuminated.

The CTD system commands the instrument cluster to control the telltale only when the ignition switch is OFF. The CTD system uses the telltale to identify system status.

Telltale FLASHING -- The system is in standby mode. The system is not ready to arm (a door is open).

Telltale ON STEADY -- The system is in delay mode. The system is ready to arm and is executing a time delay of 15 seconds before turning the lamp OFF and transitioning to armed mode.

Telltale OFF -- The system may or may not be armed.
Body Control Module (BCM) The body control module (BCM) monitors several inputs in order to arm and disarm the CTD system. The BCM controls the alarm function outputs. When the BCM detects an unauthorized entry (any door opened), the BCM applies ground to the horn, the park lamp and the headlamp relays. The BCM will send messages to the security telltale in the instrument cluster through the Class 2 serial data link. The BCM has the following 8 basic modes for operating the CTD system. The more detailed descriptions are below.
Off state

Idle state

Disarmed state

Ready-to-arm state

Arm initiated state

Arm delay state

Armed state

Alarm state

The BCM has the following 6 discrete inputs in order to monitor the CTD system:
Ignition 1

Driver door latch (door jamb) switch

Passenger door latch (door jamb) switch

Door lock relay

Door key switch

Passenger door unlock relay

The BCM applies ground once per second for approximately 2 minutes, or until a valid input to disarm the system is received by the BCM.
Check the door lock relay !

Jun 16, 2016 | Cars & Trucks

2 Answers

No electric power to left door Fuse and relay are good

Check the wire lume that runs from the body to the door inside a rubber bellow. the wires can break from constant moving and I'm not sure what vehicle you have, but this is a defect for a few vehicles out there the wire can be to short in some cases from cost saving manufacturing. It may be necessary to remove the door panel and remove the harness through the wire opening to be able to move the boot far enough to access the broken wire or even just to check it in some cases.
How I like to repair it, is to put a new wire through the entire pivot point and join it inside the door and body where the wire does not move constantly.

Hope this helps

Mar 04, 2015 | 2007 Saturn ION-2 Quad Coupe

5 Answers

Hello I have a 1997 Honda civic ex coupe manual trans, my issue is that the power lock won't work and the passenger side window doesn't work either, the only one working is the driver side power window...

Most probable cause , ,,, when you open & close the door, the wires in the rubber boot (accordian like) harness in between the door hinges, get cut and will cause alot if issues, without burning a fuse !

Oct 25, 2014 | 1997 Honda Civic

1 Answer

2003 jeep sports liberty door locks clicking draining battery

AAA guys dont fix car, they rescue them....
the door lock system is broken
you have 2 choices. may be 3
  1. Take it to any ASE mech, and he fixes,it.
  2. Get the FSM from JEEP open the page on DOORS, and do the tests shown there.
  3. Using SAME FSM defeat the DOOR system. using keys.
#3 may just be a fuse pull, ill look that up now for you. ....lets see...
what id do.
id check all fuse first for blown, with an ohmmeter, 0=good, infinity = bad.
then id pull all the door relays. in the main junction box.
is the battery drain gone (i use and ammeter to find that truth)
THE BCM (body control module ) runs the locks, so you can just
pull its fuses.. or other things die.

keep in mind that door locks are alive , keys in pocket.
so that begs the question, is the BCM messing up (or relays stuck)
or is the BCM being told to open a door, full time ?
id connect any scan tool to the OBD2 conn. and see if there are fault codes. (like relay stuck door, etc)
stuck switch for doors."called door lock switch mux" by Jeep.
The BCM has many relay that it controls, pull them all and see
which one is causing the DRAIN, key off
and work backwards from there.
the BCM has RKE data line, this is the remote key receiver.
if it goes nuts it might seen door commands to the BCM full time.
so unplug it, to see if the commands end.
its called the RKEM (m for module)

the problem focus is the BCM is the brain that runs it all.
it has inputs and outputs.
the brain (processor) can have a bad input (switch or RKE)
or the output can stick (prime target door relays)
that is it .
i cant find the JB B+ hot feed, drawing, there are over 50 pages on this JB. a real FSM would win here. to find the door power actual feed .
such is life, in newer complex cars....
login to
see that.

Mar 10, 2014 | Jeep Liberty Cars & Trucks

1 Answer

My 1998 nissan pathfinder auto door lock clicks when im driving and locks automatically when I unlock the truck

That sounds like a possible bad door lock switch to me. I have also seen defective door lock control modules cause the same symptoms. These things can also cause your battery to drain because it is probably also doing this when the vehicle is shut off. The power lock solenoids in the doors will also bedestroyed if it is allowed to continue.

If you cannot get it diagnosed and repaired right away, I recommend unplugging your door lock control module to prevent furter damage to the vehicle. Yours is located under the dash next to the fuse block. (See picture)


Oct 31, 2011 | 1992 Nissan Pathfinder

1 Answer

Power door locks won't work from doors switches

I had same problem on my 99' Suburban and found it was that the accessory fuse (25A,) had blown due to a shorted accessory. I replaced the fuse after determining the short and door locks started working once again with door switches.

Jun 24, 2009 | 2004 Chevrolet Venture Passanger

2 Answers

Wnere is fuse located for door locks, power seat, and gas cap door on 90 lincoln town car?

dhmwv: your fuse box is located in the passenger's compartment under the dash to the left of the steering column.

May 03, 2009 | 1990 Lincoln Town Car

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