72 A/C Wiring Harness? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Luis_gz06 · 06-27-2012, 03:34 PM

Hi everyone. Anyone know where does the long orange a/c wire plug into the fuse box? Also, does the wire run on top or bottom of the radio and on top along with the main harness? Any help is appreciated. Thanks!

Luis_gz06 · 06-29-2012, 01:01 AM

ttt

Daddy'O · 06-29-2012, 07:09 AM

If your speaking of the orange wire that goes to the AC blower motor relay then it plugs into the CIG terminal in the fuse block. I am not 100% sure of the factory correct routing of the AC harness. My assembly book is at home - and I am not. Hopefully someone can verify the routing for you today.

rsavage · 06-29-2012, 07:51 AM

Assembly Manual indicates the orange wire from the A/C harness is plugged into one of the "ignition unfused" terminals on the fuse block. HOWEVER, the Chassis Service Manual Four Seasons A/C wiring schematic shows the 12g orange going to the "cig" terminal and replacing the fuse with a 25 amp. The 20g grey wire for the control lights goes to the "panel lights" terminal.

Assembly manual shows the wire going across the bottom for your control connections and then up across the top and around the dash hole.

Luis_gz06 · 06-29-2012, 04:16 PM

Quote:

Originally Posted by rsavage

Assembly Manual indicates the orange wire from the A/C harness is plugged into one of the "ignition unfused" terminals on the fuse block. HOWEVER, the Chassis Service Manual Four Seasons A/C wiring schematic shows the 12g orange going to the "cig" terminal and replacing the fuse with a 25 amp. The 20g grey wire for the control lights goes to the "panel lights" terminal.

Assembly manual shows the wire going across the bottom for your control connections and then up across the top and around the dash hole.

Thanks! Which dash hole?

rsavage · 06-29-2012, 04:23 PM

The large hole that the instrument panel goes into. Once it gets over to that area it goes up and above like the main harness does using the same bendable wire clips that are up there.

Luis_gz06 · 06-30-2012, 11:40 AM

Quote:

Originally Posted by rsavage

The large hole that the instrument panel goes into. Once it gets over to that area it goes up and above like the main harness does using the same bendable wire clips that are up there.

Thanks alot! Did not understand at first about the dash hole. Does the glovebox light harness run the same on the top with the main harness? Thanks!

06-27-2012, 03:34 PM	#1
Luis_gz06 Senior Member Join Date: Feb 2006 Location: Las Vegas Posts: 1,378	72 A/C Wiring Harness? Hi everyone. Anyone know where does the long orange a/c wire plug into the fuse box? Also, does the wire run on top or bottom of the radio and on top along with the main harness? Any help is appreciated. Thanks! __________________ 1972 Chevrolet Blazer 4x4 (Almost done stay tuned) 1970 Chevrolet Pickup Longhorn CST/20 (SOLD)

06-29-2012, 01:01 AM	#2
Luis_gz06 Senior Member Join Date: Feb 2006 Location: Las Vegas Posts: 1,378	Re: 72 A/C Wiring Harness? ttt __________________ 1972 Chevrolet Blazer 4x4 (Almost done stay tuned) 1970 Chevrolet Pickup Longhorn CST/20 (SOLD)

06-29-2012, 07:09 AM	#3
Daddy'O Registered User Join Date: Jan 2012 Location: Whitesboro, Texas Posts: 932	Re: 72 A/C Wiring Harness? If your speaking of the orange wire that goes to the AC blower motor relay then it plugs into the CIG terminal in the fuse block. I am not 100% sure of the factory correct routing of the AC harness. My assembly book is at home - and I am not. Hopefully someone can verify the routing for you today. __________________ Cheers - Wayne Our Shop Build - http://67-72chevytrucks.com/vboard/s...d.php?t=620966 '55 Wagon Build - http://67-72chevytrucks.com/vboard/s...d.php?t=689157 1971 Cheyenne Super Ochre/White LWB 350 Auto - my son's truck "Nancy" 1972 GMC K2500 Custom 4X4 Olive LWB 400 SB 4-speed -"Greenie" - Restoration to begin after the '55 Nothing sucks more than that moment during an argument when you realize you're wrong.

06-29-2012, 07:51 AM	#4
rsavage Registered User Join Date: Aug 2009 Location: Alden NY Posts: 2,705	Re: 72 A/C Wiring Harness? Assembly Manual indicates the orange wire from the A/C harness is plugged into one of the "ignition unfused" terminals on the fuse block. HOWEVER, the Chassis Service Manual Four Seasons A/C wiring schematic shows the 12g orange going to the "cig" terminal and replacing the fuse with a 25 amp. The 20g grey wire for the control lights goes to the "panel lights" terminal. Assembly manual shows the wire going across the bottom for your control connections and then up across the top and around the dash hole. __________________ 1961 C1 Corvette 1959 El Camino 350 TPI, 9" 4 w disc 69 Blazer K5 - sold July '20 2021 Durango RT 5.7

06-29-2012, 04:23 PM	#6
rsavage Registered User Join Date: Aug 2009 Location: Alden NY Posts: 2,705	Re: 72 A/C Wiring Harness? The large hole that the instrument panel goes into. Once it gets over to that area it goes up and above like the main harness does using the same bendable wire clips that are up there. __________________ 1961 C1 Corvette 1959 El Camino 350 TPI, 9" 4 w disc 69 Blazer K5 - sold July '20 2021 Durango RT 5.7



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.