Need imediate help with wiring

Flowtech1ton · 05-09-2008, 09:51 AM

Guys I have a 1988 GMC Sierra 3500 4x4 SL with stock windows and locks without power. I recently bought a set of new doors off a 1988 2500 SLE. They have power locks and windows however I do not have the wiring harness that connects from each door to under the dash to get power to the doors. I have had **** trying to get the harness and have had no luck. What I need is a diagram on how to wire these up so they work. PLease help

87c10slammer · 05-10-2008, 05:48 AM

pm 75K30 he might be able to get it for you. i only have it up to 87 when they switched things up alittle

Sneakysportsman · 05-10-2008, 07:02 PM

Invest in a $20 Haynes Manual, it will come in handy in more ways than you know. Wiring diagrams in the back. I believe I can get you a complete harness, my neighbor down the road has a Salvage yard and I know he has a harness. You will nees to plug it into the fuse box on a 12V power. I converted my first Chevy from man to power. You will have to remove the doors to drill the holes in the cab frame for the wires to pass thru. the doors already have them.

436'd skylark · 05-10-2008, 07:21 PM

The wiring for power windows and locks is ridiculous. Lots of wires and probably more trouble than its worth. I looked into it form my Buick, and its way more complicated then you think, but it is possible. I'd go to a junk yard and pull a harness from a donor truck.

Chevy_Finatic79 · 05-10-2008, 08:41 PM

I changed my truck from manual to power Windows/Locks and I thought it was simple the hardest thing was Drilling the door jam holes and mounting the relay because you have to lay on the floor.

I just might have the harness you need. Let me do some diggin and see if I cant find it and take a picture. I'll lable what wires go where

05-09-2008, 09:51 AM	#1
Flowtech1ton Junior Member Join Date: Apr 2008 Posts: 9	Need imediate help with wiring Guys I have a 1988 GMC Sierra 3500 4x4 SL with stock windows and locks without power. I recently bought a set of new doors off a 1988 2500 SLE. They have power locks and windows however I do not have the wiring harness that connects from each door to under the dash to get power to the doors. I have had **** trying to get the harness and have had no luck. What I need is a diagram on how to wire these up so they work. PLease help __________________ 1988 GMC Sierra 3500 4x4 GM 350 Crate motor True dual Flowtech exhaust

05-10-2008, 07:21 PM	#4
436'd skylark Senior Member Join Date: Mar 2007 Location: Buffalo Ny Posts: 620	The wiring for power windows and locks is ridiculous. Lots of wires and probably more trouble than its worth. I looked into it form my Buick, and its way more complicated then you think, but it is possible. I'd go to a junk yard and pull a harness from a donor truck. __________________ Joe 89 K2500 Chevy, Wee-Oh-five 285K miles, completly rebuilt needs a motor, bad 1962 IHC Scout All Wheel Drive (Scout speak for locking axles) 152 ci, dana everything else

05-10-2008, 08:41 PM	#5
Chevy_Finatic79 Senior Member Join Date: Mar 2008 Location: Lincoln NE Posts: 439	I changed my truck from manual to power Windows/Locks and I thought it was simple the hardest thing was Drilling the door jam holes and mounting the relay because you have to lay on the floor. I just might have the harness you need. Let me do some diggin and see if I cant find it and take a picture. I'll lable what wires go where __________________ "She's gonna Freak when she see's my wheels" 85' Chevy C-10 Longbox (Rat) TBI 5.7 Liter/THM350 90' Chevy Suburban 4x4 TBI 350 Cu.In./700R4 http://www.truckforum.org/forums/truck-pictures-176.htm

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05-10-2008, 05:48 AM	#2
87c10slammer Senior Member Join Date: Mar 2008 Location: levittown pa Posts: 2,145	pm 75K30 he might be able to get it for you. i only have it up to 87 when they switched things up alittle

05-10-2008, 07:02 PM	#3
Sneakysportsman Senior Member Join Date: Jun 2007 Posts: 222	Invest in a $20 Haynes Manual, it will come in handy in more ways than you know. Wiring diagrams in the back. I believe I can get you a complete harness, my neighbor down the road has a Salvage yard and I know he has a harness. You will nees to plug it into the fuse box on a 12V power. I converted my first Chevy from man to power. You will have to remove the doors to drill the holes in the cab frame for the wires to pass thru. the doors already have them.