3 out 4 door locks and windows not working


#1

I have a 2000 pontiac bonneville with 112K miles on it.
My drivers door window and lock is working. Other 3 will not work at master switch nor the secondary switches.
I have tried out another master switch and had the same issue occur. I have tested the fuses with a jump wire and it’s not the fuses. I checked the door jam and found a cracked black and a cracked orange wire. I opened them and the wires are intact. With the ignition off I hear clicking at the motor with the driver switch, but nothing from the other 3. I am really stumped on where the problem could be.
Wiring diagram for the the windows are dark blue and brown wires. I have only 1 of each leading from the body control module through the door jam. It seems that the problem must be where all 4 meet and not sure where else to look. Any ideas?


#2

Some cars have a switch that lets the driver cut power to all the door locks and windows except the driver’s. It may be on the driver’s door.


#3

There is a connector that shows a lock and and a unlocked lock on it in the drivers door.could this be the switch your talking about? If so how do I bypass it? Could I just cut the wires on each side and wire them together if this is the problem.


#4

The first thing I was going to say was a new master switch in drivers door… Where did you get the “other switch” was it from a yard or used? This could be an endemic issue with this model and perhaps the other switch is just as faulty as the original?

Blackbird


#5

I tracked one down at a salvage yard. Brand new the switch is $130 and I wanted to make sure it was the switch before putting that kind of money into something that might not be the problem.


#6

If you suspect the LOCK switch for the windows is faulty just use a jumper wire across the contacts in order to bypass it. You could also just check the voltage across the contacts. A good working switch will have zero volts across the contacts when the contacts are closed. This is the same as checking the voltage across a short piece of wire, there is no resistance to have a voltage drop occur.

Along with making sure power is getting to the other doors make sure the ground return side is good also. It seems you either have a lock switch issue or there is a common ground connection issue.

WELL wait a minute, I have now looked at some data for your vehicle and it seems you have one of the most complicated window and door lock circuits I have ever seen. Each door has its’ own control module. There is a common splice connection for the data buss called S302. It is common for the windows and locks. The wire color is tan/wht. You might make sure you have continuity to all the modules on that wire.