Whats this wire for? - Page 2 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

dadsworktruck · 02-09-2011, 12:09 AM

this is cool!!, bruce88 i think your spot on! i went out eariler and saw the same wire on my 72 donor truck, but didnt on my 69, bad thing on mine it was cut at the engine near the dist L-6 eng, so i didnt know where it went myself,,,it is the brown/wire wire.it splices at the connector and goes to a relay mounted on the firewall above the bulkhead connector..good job...bruce88 and the forum....don

Bruce88 · 02-09-2011, 02:16 AM

Quote:

Originally Posted by BAGNDRAGIT

i dont see a white trace on it. (according to the diagram).

where does the wire go? stub at the bulkhead connector? in the cab somewhere? sorry if it was stated, my eyes are tired and i didnt want to read..

I don’t know why there’s no white on the brown wire, maybe they just ran out of brown/white wire when they where building the wire harness and just used brown wire (smile). It’s the only brown wire coming out of the RH connector of the bulkhead block.

The 141 circuit is powered thru the TCS/radio fuse on the fuse block when the key is on.
This is based on a 1972 Chevy truck wiring diagram.

**leddzepp** · 02-09-2011, 02:31 AM

Quote:

Originally Posted by vectorit

Under hood light?

This was one of my guesses as well. I pulled my truck apart, put it all back together...and have this same wire that is "left over". I don't remember it attaching to anything prior to disassembly...it may have been tucked into the harness. It is not for the brakes. The trans kick down switch is on the gas pedal and the harness it attaches to is separate and goes directly to the TH400. My truck runs fine, no electrical problems, so it doesn't go to anything "important" as far as I can tell. 12 volts flow through it when the ignition is on, so it is a keyed source. The wire is very thin gauge, so I suspect it doesn't power anything that requires high amperage. It is solid brown also, but the TCS diagram makes sense to me. Where is the TCS located? I am currently using this wire for the electric choke on my Edelbrock...it plugged right in

Willys47 · 02-09-2011, 02:58 AM

what year is your truck in 1968 the kick down switch was at the carb linkage

**leddzepp** · 02-09-2011, 03:04 AM

Quote:

Originally Posted by willys47

what year is your truck in 1968 the kick down switch was at the carb linkage

72

02-09-2011, 12:09 AM	#26
dadsworktruck Registered User Join Date: Jul 2009 Location: blacksburg,s.c. Posts: 155	Re: Whats this wire for? this is cool!!, bruce88 i think your spot on! i went out eariler and saw the same wire on my 72 donor truck, but didnt on my 69, bad thing on mine it was cut at the engine near the dist L-6 eng, so i didnt know where it went myself,,,it is the brown/wire wire.it splices at the connector and goes to a relay mounted on the firewall above the bulkhead connector..good job...bruce88 and the forum....don

02-09-2011, 02:58 AM	#29
Willys47 Registered User Join Date: Dec 2007 Location: Nanaimo B.C. Posts: 604	Re: Whats this wire for? what year is your truck in 1968 the kick down switch was at the carb linkage __________________ I was hooked on these trucks since 1982 when I drove my budys fathers 1968 Custum GMC 396 automatic dana 60 rear with a power lock diff what a ride more fun then we will we can ever tell!! Last edited by Willys47; 02-09-2011 at 02:59 AM.



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