Right side door lock problem 2001 silverado

[tawas23]

Having a (lock only issue) with the RH side door not locking ..I replaced the door lock actuator and only the passenger side will not lock with either drivers or passenger side button ..I have two of the same actuator and both actuators will unlock only ..I checked all fuses and there all good ..the drivers side work fine only the passengers side will unlock but not lock..I hear the actuator unlocking but nothing when locking ..no noise when locking ..drivers side works fine ..I replaced the button on passengers side and still will not lock only unlock ..please help if you can thanks Eric

[gmtech4]

you want some diagnostic schematics ?,i need to know if you have a 4 door or ext cab or base model,,,

 

i think ya have a broken wire

[tawas23]

Extended cab..Can anyone help me understand the 3 plugs going to my door actuator..The ones I know out of three are.. number one.. 2 prong for keyless entry..number 2 another two prong for unlock / lock?? ..but dont understand number three.. 3 prong plug or longer plug?? I received my wiring diagram.. by the way thank you ..and wiring diagram shows me grey/tan to lock and unlock do I really need any more info before I make sure the grey and tan are working correctly to figure out why it unlocks but doesn't lock only passenger side??

[gmtech4]

[gmtech4]

i tried a diag tree for ya but it pasted weird

[bossier62guy]

Put a test light in the unlock side of the actuator plug. If it doesn't light when the switch is depressed and the fuse is good check the unlock relay. Reply back...

[tawas23]

thank you for the diagram ..can my door lock relay be bad causing ONLY the passenger side not to lock???

[bossier62guy]

thank you for the diagram ..can my door lock relay be bad causing ONLY the passenger side not to lock???

According to what I'm seeing....yes, swap the drivers/pass side and see what you get.

[tawas23]

Well still stumped ... I replaced lock relay and nothing same problem ..then I checked tan/blk and grey/black door lock and unlock power at actuator.. grounded my test light and probed both wires..they both light up when button is pressed..replaced button also.. nothing..thinking maybe ground on lock position only passenger side ????? Is there a way to ground wires since they light with test light grounded ..STUMPED ....keep in mind I have two new actuators and both will unlock but not lock???

[bossier62guy]

I don't see a dedicated ground wire running to the actuator plus if it's working one way and not the other the odds of a grounding issue are slim. You didn't say what brand of actuators you have been trying. Are you sure they are the correct parts? Since you have power at the actuator plug I would take the second actuator and apply 12v to it to see if it works like that. Do you get any click, etc. or is it just dead silence when you try to lock it?

[tawas23]

one actuator is after market the other is AC delco ..when I press unlock it works.. but nothing no sound at all when locking..dead like you said..all plugs plug in 3 total..all plugs plug in correctly and both actuators look the same http://www.ebay.com/itm/160792553019?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649 this is the link

[tawas23]

Where can I find the BCM at maybe that is it ..I will replace if someone can tell me where to find the location plz..

[bossier62guy]

The BCM is behind the drivers side knee bolster....although I seriously doubt it's causing you problems. You say you've got 3 connectors on that actuator? The wiring diagrams show 2 wires total. Anyway you can attach a picture of it?

 

BTW....the only function of the BCM in the system is when the remote is in use.

[bossier62guy]

Here's some info on the BCM incase you still wish to pursue that as the source of your problems.

BCM.pdf

BCM.pdf

BCM.pdf

BCM.pdf

[tawas23]

yea did so reading on the BCM and agree probably not the problem.. the 3rd plug is for remote keyless entry ..any ideas from what I explained.of what to check next..thank you for helping me