98 Tahoe wiring help

[9dreizig]

My power door locks don't work ( any of them) I've checked all the fuses, it looks like there's a relay in the circuit somewhere but I can't seem to find it.. Any suggestions ? I've checked all of the fuse/ relay boxes that I can find,,
Thanks
Todd

[Brian 162]

It's possible there could be a broken wire in the harness in the rubber boot where it passes through the door to the switch.

[Shaun @ Tru6]

http://www.tahoeforum.com/showthread.php?p=4671

[lm6y]

Todd, there is a door lock relay under the center of the dash. It has six wires, ORANGE, TAN, WHITE, LT BLUE, GREY, and BLACK.

Orange: is constant hot.

Tan: goes to terminal "A" on all of the lock actuators.

White: goes to the unlock terminals on each door switch, and also to terminal "D"
on the door lock control module (Front of Left Rear Wheelhouse).

Lt Blue: goes to the lock terminal on the door switches, and terminal "C" on the lock module.

Grey: Goes to the "B" terminal on the lock actuators.

Black: is ground.

The orange wire runs to a constant hot, 30A fuse, PWR ACCY / CB , in the instrument panel fuse block (left hand side of the dash).

I can try to send you a schematic if you want, it might be too small to use though.

[9dreizig]

Thanks Shaun,, I was on GMtruck.com but it sucked... Damn you can really appreciate this forum with the amount of inactivity on the others..

[9dreizig]

LM6,, I have the schematic thanks,, and just found the relay with the info Shaun gave me. I'll figure it out tomorrow in the light..

[Shaun @ Tru6]

Todd, you back here for Thanksgiving?

[9dreizig]

I am, should be getting into Manch the Friday before and hanging out till Tue after.. let's get together!

[ChrisBennet]

Originally Posted by 9dreizig

I am, should be getting into Manch the Friday before and hanging out till Tue after.. let's get together!

Saturday is Thanksgiving with Chris&Janus. C'mon down!
-Chris

[9dreizig]

Originally Posted by ChrisBennet

Saturday is Thanksgiving with Chris&Janus. C'mon down!
-Chris

Sat before or Sat after TG ? Either way I'm in!!!! Hey any luck getting the VW running ??
T

[Shaun @ Tru6]

Originally Posted by 9dreizig

I am, should be getting into Manch the Friday before and hanging out till Tue after.. let's get together!

Cool, see you then! I'm not going to MN this year.

[9dreizig]

Ok guys, I picked up a new door lock relay and no luck.. Here's a wiring diagram.. I have 12 volts on the orange to the relay ( it's a 4 door so look at the relay on the right).. When I short the orange to the tan or light blue it does activate the door locks).. I don't get a full short on the black to ground conductivity check. So now where do I look for a broken wire?? I'm thinking maybe the black wire?? Suggestions ?

[HWgeek]

Hey Todd,

Do you have 12V on the other orange (to the door lock switches)No power there would cause a no go condition. Using a meter, are you grounding on the chassis, or grounding on the black wire on the relay? By trying both ways, you can tell if your black is broken.
Orange --> meter --> chassis = 12V
Orange --> meter --> black wire = ??

On the output of the switches (coming into the relay) do you see 12V???

[9dreizig]

Charles, yes 12 on the orange, I'll make some measurments tomorrow and comment.., thank Nicole for letting you look at this for me