[jkohler]

I have a 2003 GMC Safari and the door locks do not work with either key fob or inside controls. Fuse appears ok. All other power acessories work. When the controls are pressed you can hear clicking in the doors like the actuators are getting power, but not enough. They quit in a sequential manner over a couple months time- First the drivers door, then the passenger door, then the rear , and finally the side door. I'm the original owner and nothing has ever been rewired or added. I have a 1993 wiring diagram that shows a door lock relay and a module as two separate items, but don't know where located. It may be the ground connection, but don't know where that occurs. Can anyone help?

 

[fungus2k]

Good luck on this one, it seems to be a re accuring thing in these vans, i just gave up and got used to giving people shit for not locking my doors
The wifes pretty well trained now though lol

 

[Big_kid]

Tried lubricating the solenoids?

 

[astro355]

Two things happened with these solenoids, in all GM cars.

1). Corrosion builds up on the terminals and not enough electrical current can pass thru the solenoid to lock or unlock the door. Cleaning the terminals WILL fix the problem.

2). Lack of lubricate on the connecting rods and levers to create more mechanical resistance than the solenoid was made to move. Lubricating any joints or other moving parts MAY fix the problem. Otherwise, the increased resistance has damaged the solenoid and it would need to be replaced.

 

[toddb]

Good luck on this one, it seems to be a re accuring thing in these vans, i just gave up and got used to giving people <censored> for not locking my doors
The wifes pretty well trained now though lol

LOL that's how I'd fix mine too LOL

But I'd go with a poor ground or corroded B+ for the cause.

 

[maximus7001]

I also am an original owner. I find that when a battery gets older this happens. This has happened with every battery thats been in there, all 7 of them. They probably work fine with the van running.

 

[CaptSquid]

I have to agree with cleaning the terminals and lubing the solenoids with a good graphite lube. Take a meter to your beastie's battery, too, and determine if it is kinda weak.

 

[jkohler]

Tried lubricating the solenoids?

I have not tried to lubricate the silenoids, as I felt it's more electrical because of the way they all quit working. The symptom went from the drivers door to all of the others over a short period of time. Would they all need oil at the same time?? I guess I'll try that this week, to rule it out. Thanks, John

 

[jkohler]

I also am an original owner. I find that when a battery gets older this happens. This has happened with every battery thats been in there, all 7 of them. They probably work fine with the van running.

I haven't checked the battery out as I just put a new one in last fall and there's no other malfunctions. I'll have it tested. Thanks. John

 

[KHPower]

The factory wiring that is wired to the actuators can fray and leave a cut cords between the van and door from contionous opening and closing of the doors. i had the same problem and rewired and it fixed everything! Just a idea