1969 GMC Wiring Questions - The 1947 - Present Chevrolet & GMC Truck Message Board Network

69gmc292 · 04-02-2007, 08:37 PM

I have a 1969 GMC 1/2-ton pickup that has a 292 and a TH350. I went thought the entire wiring system and replaced the wiring that was bad and fixed the parts that were missing. The guy i bought the truck really did a number on it because the truck had a eletircal short. I followed the 1968 Wiring diagram in the 1967-1972 factroy assembly guide and thought i got it right. The question is i think that the main charging system is wrong because when i have key on the run position everything works like the heater, headlight, turn and brake lights, but when i turn the key is is the off positions everything turns off and the entire electrical system goes dead. Do I have something wrong or is this so post to happen.

BurnoutNova · 04-02-2007, 09:25 PM

on my 71 the heater doesnt work with the key on, but the horn, hazzard light and all the lights work with the key off.

Longhorn Man · 04-02-2007, 10:39 PM

heat, turn signals, back up lights, wipers, and radio... I think that's everything that's shut off with the key.
Well, power to the distributor too.

04-02-2007, 08:37 PM	#1
69gmc292 Registered User Join Date: Mar 2007 Location: tucson Posts: 71	1969 GMC Wiring Questions I have a 1969 GMC 1/2-ton pickup that has a 292 and a TH350. I went thought the entire wiring system and replaced the wiring that was bad and fixed the parts that were missing. The guy i bought the truck really did a number on it because the truck had a eletircal short. I followed the 1968 Wiring diagram in the 1967-1972 factroy assembly guide and thought i got it right. The question is i think that the main charging system is wrong because when i have key on the run position everything works like the heater, headlight, turn and brake lights, but when i turn the key is is the off positions everything turns off and the entire electrical system goes dead. Do I have something wrong or is this so post to happen.

04-02-2007, 09:25 PM	#2
BurnoutNova Registered User Join Date: Mar 2004 Location: CA Posts: 2,057	Re: 1969 GMC Wiring Questions on my 71 the heater doesnt work with the key on, but the horn, hazzard light and all the lights work with the key off.

04-02-2007, 10:39 PM	#3
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	Re: 1969 GMC Wiring Questions heat, turn signals, back up lights, wipers, and radio... I think that's everything that's shut off with the key. Well, power to the distributor too.



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.