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CHECK DOOR LOCK SWITCH - Cars & Trucks

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Posted on May 02, 2013

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2005 Buick Rendezvous you can hear the relay clicking but the door locks will not open and close


Check for broke wires inside the boot from body to driver door , this is a common problem . If you don't find broke wire's , pull the door panel to get at driver door switch . Check for voltage an ground circuit .
Rendezvous Door Lock System Components
The power door lock system consists of the following components:
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Body control module (BCM)


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Driver door lock switch


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Front passenger door lock switch


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Door lock actuators in each of the doors


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Door lock system fuse into the BCM (BCM D 25A fuse)


Door Lock Operation
When the BCM detects a transition of either of the door lock switches to the LOCK position, it switches the door lock actuator lock control circuit to voltage. Since the lock actuator unlock control circuits are at ground potential within the BCM, the door lock actuator motors transition to the Lock position.
Driver Door Unlock Operation
When the BCM detects a transition of either of the door lock switches to the UNLOCK position, it switches the driver door lock actuator unlock control circuit to voltage. Since the door lock actuator lock control circuit is at ground potential within the BCM, the LF door lock actuator motor transitions to the Unlock position.
The driver door lock actuator unlock control circuit is a dedicated control circuit used only for the driver door lock actuator motor. This is done so that the driver door may be unlocked by itself using a keyless entry transmitter or an automatic door unlock function (if programmed).
Passenger Door Unlock Operation
When the BCM detects a transition of either of the door lock switches to the UNLOCK position, it switches the door lock actuator unlock control circuits to voltage. Since the door lock actuator lock control circuit is at ground potential within the BCM, the passenger door lock actuator motors transition to the Unlock position.
The door lock actuator unlock control circuits are dedicated control circuits used only for the passenger door lock actuator motors. This is done so that the driver door may be unlocked seperate from the passenger doors using a keyless entry transmitter or an automatic door unlock function (if programmed). This video on testing computer controlled door locks on a Subaru , doesn't matter . test yours same way > The BCM controls your door locks .
Are all of the power door locks inoperative from both door lock switches?

Oct 12, 2016 | 2005 Buick Rendezvous

2 Answers

Mervia. Why is central locking not locking any door?


It's only an educated guess. If all other locks switches are working it' either the switch panel itself or an electrical short. Switches are popular, get it checked first

Nov 22, 2015 | Vauxhall Cars & Trucks

1 Answer

Door lock won't open dodge ram


All of the locks, one lock, remote or from the main switch ( driver door) If it's one door , usually switch/ wiring or linkage in the single door. All doors from main switch, check conn at main switch,ck for voltage at switch. If you have voltage 9 x out of 10 main switch. (especially Dodge) PS use a test light

Sep 19, 2015 | 2008 Dodge Ram 2500

2 Answers

What causes a malfunction in power locks?


The power door locks are controlled by the BCM -body control module ! The door lock switch is an input to the BCM .
The BCM, upon receipt of a door lock switch lock or unlock signal, will switch the appropriate door lock actuator control circuits to battery positive voltage. The opposing side of the door lock actuators are connected to ground internally within the BCM through the other door lock actuator control circuit and the doors will lock or unlock appropriately.
First thing to do would be check power an ground circuits at the BCM ! Do you have any other systems not working -power windows etc...
The DR/LCK fuse supplies battery positive voltage to the I/P fuse block for the door lock system. The body control module (BCM) supplies and monitors a reference voltage to the door lock switch through the door lock switch lock/unlock signal circuit. The door lock switch also receives a constant ground source. If a door lock switch is placed in the lock position or unlock position, the reference voltage is taken directly to ground and the BCM detects the voltage drop on the signal circuit.
Should have BCM checked for stored DTC'S - diagnostic trouble codes !
Ignition ON, observe the scan tool Driver Door Lock Sw, Psgr Door Lock Sw, Driver Door Unlock Sw and Psgr Door Unlock Sw parameters while using the driver and passenger door lock switches. The parameters should change between Active and Inactive.
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If the values does not change between the commanded states, refer to Door Lock Switch Malfunction.

Command the driver door and passenger door lock actuators to LOCK and UNLOCK with the scan tool, the doors should LOCK and UNLOCK when changing between commanded states.
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If a door lock actuator does not perform the LOCK and UNLOCK functions, refer to Door Lock Malfunction


DTC B3130 00: All Door Unlock Circuit

DTC B3135 00: All Door Lock Circuit

Aug 09, 2015 | 2010 Chevrolet Impala

2 Answers

Why won't rear passenger door unlock with auto lock switch?


latch may be damaged /gummed up --or lock rod/retaining clip damaged or disconnected you will need to remove the door panel to inspect the lock unit

Aug 09, 2015 | Lexus RX 300 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

1 Answer

Electric door locks


none of the locks work? check fuses first. then check for power at the drivers door lock switch because it is the master switch that feeds all other switches and actuators. if it has power at the switch and through the switch when pressed, start on that drivers door checking for good battery voltage and ground at the lock actuator. if you have power at the drivers switch but no power through it, when depressed, replace the switch.

Apr 01, 2014 | 2003 Lincoln Town Car

1 Answer

92 Honda Accord EX Wagon doors not locking


If it was the actuator in the drivers door the other doors would still lock. this sounds like a bad connection, test the drivers door switch, the other thing is do the doors lock if you use the pass/door switch to lock the doors? if it doesnt then its not the switch but if it does lock the doors then replace driver door lock switch. if the switch on pass door doesnt work to lock then check wiring. look at wiring going into driver door, look at the door, open it, look at door hinge area and in the middle you will see the rubber boot that holds the wiring for that door. remove the boot or rather slide it back and check for any broken wires. its common for wires to break from opening and closing the door. good day.

Oct 20, 2011 | 1992 Honda Accord

1 Answer

1998 Ford Explorer - The Drivers Side Switch will not lock doors.


check the wiring going to the driver door switch. Check where it goes into the door and check for a pin push out in the door switch connector.

Oct 07, 2009 | 1998 Ford Explorer

1 Answer

Car won't start


Hi, does the alarm shut off when you unlock the passenger door?
If it does not I will give you a test that you can do.
1. disconnect the harness anti-theft control module. (loctaion depend were you live USA next to fuse panel Canadian models above the glove box.) Check the continuity between Light Green/Black wire and Black wire of the anti-theft control module.
2. Continuity should not be there with the door lock in, lock or neutral position. With the door lock in-between lock and neutral position (any door) continuity should be present.
3. If continuity is as specified replace the anti-theft control module. If continuity is not as specified, check operation of the door lock switches.I will add that test at bottom.
4. If the door lock switches are ok check the continuity og LIGHT/BLACK wires between anti-theft control module and door lock switches. Check Continuity of BLACK wire between door lock switches and ground. Continuity should be present if Continuity is not present repair harness or connectors.
5. If Continuity is present, check continuity LIGHT GREEN and BLACK wire of anti-theft control module. Continuity should not be present with trunk lock in lock or neutral position. With trunk lock in-between lock and neutral position, Continuity should be present.
6. If Continuity is as specified replace anti-theft control module. If Continuity is not as specified, check operation of truck lock switches. If necessary replace trunk lock switch.
7. If trunk lock switch is ok, check Continuity og LIGHT GREEN wire between anti-theft control module and trunk lock switch. Check Continuity of BLACK wire between trunk lock switch and ground. Continuity should be present. If Continuity is not present repair harness or connectors.

DOOR LOCK SWITCHES
Disconnect 4-pin door lock switch connect (left and right front doors) With door lock in neutral, full lock or full unlock position, there should be no continuity between any terminal and BLACK wire terminal. Continuity should exist between LIGHT GREEN?WHITE wire and BLACK wire terminals with door lock in-between neutral and full lock position. Continuity should exist between LIGHT GREEN/BLACK wire and BLACK wire terminals with door lock in-between neutral and full unlock positions. If continuity is not as described, replaced door lock switch.

Hope this help its a place to start. let me know if you need anything else.

Cheers

Aug 23, 2008 | 1994 Nissan Maxima

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