wiring question, probably the first of many to come in the next few months - The 1947 - Present Chevrolet & GMC Truck Message Board Network

teeitup · 01-22-2012, 09:03 PM

1st of all I'm used to parting not putting back together so I need some of you guys input. I'm just trying to get my parts all lined up so when I get it back from bodyshop I have most of it ready
My blazer is a 72 4 speed with no AC, harness is not the best, but I have a real nice underdash harness out of 71 AT with no AC. My question is about the neutral safety wiring plug on the 71 AT harness, do I need to put a jumper on them or can I leave unhooked, or can I just cut them off? I've compared both harnesses and this is the only thing I see different in them. Thanks for any help, Randy

teeitup · 01-23-2012, 09:52 AM

still looking for advice on this, Thanks

Livrat · 01-23-2012, 11:47 AM

Randy, You will need to jumper the two purple 12ga wires. also if you want backup lights you will have to modify the two small green wires as the 4spd backup switch is on the transmission and the AT version is on the column next to the neutral safety switch connection

teeitup · 01-23-2012, 05:48 PM

THANKS for the info Mark, Randy

01-22-2012, 09:03 PM	#1
teeitup Just like to part out trucks!! Join Date: Nov 2001 Location: Meriden, Ks-North of Topeka 10 miles Posts: 27,395	wiring question, probably the first of many to come in the next few months 1st of all I'm used to parting not putting back together so I need some of you guys input. I'm just trying to get my parts all lined up so when I get it back from bodyshop I have most of it ready My blazer is a 72 4 speed with no AC, harness is not the best, but I have a real nice underdash harness out of 71 AT with no AC. My question is about the neutral safety wiring plug on the 71 AT harness, do I need to put a jumper on them or can I leave unhooked, or can I just cut them off? I've compared both harnesses and this is the only thing I see different in them. Thanks for any help, Randy __________________ 67 Chev swb stepside 4x4 283 4 speed SOLD 72 blazer 4x4 4 speed Cheyenne 72 GMC swb 4x4 fleet 4 speed, original paint 1958 Cameo (one of 1405 built, it was my dads) 2020 chevy Apex 4x4 crew cab 1969 Z28 with the 302 1980 chevy swb 4x4 1964 chevell Malibu SS 1976 K20, sold new originally out of my dads chevy dealership Members that I've met, over 200 probably closer to 300 in the 12 years I've been on this site, everyone I met "It was a pleasure"

01-23-2012, 09:52 AM	#2
teeitup Just like to part out trucks!! Join Date: Nov 2001 Location: Meriden, Ks-North of Topeka 10 miles Posts: 27,395	Re: wiring question, probably the first of many to come in the next few months still looking for advice on this, Thanks __________________ 67 Chev swb stepside 4x4 283 4 speed SOLD 72 blazer 4x4 4 speed Cheyenne 72 GMC swb 4x4 fleet 4 speed, original paint 1958 Cameo (one of 1405 built, it was my dads) 2020 chevy Apex 4x4 crew cab 1969 Z28 with the 302 1980 chevy swb 4x4 1964 chevell Malibu SS 1976 K20, sold new originally out of my dads chevy dealership Members that I've met, over 200 probably closer to 300 in the 12 years I've been on this site, everyone I met "It was a pleasure"

01-23-2012, 11:47 AM	#3
Livrat Member #1049 Join Date: Jun 2000 Location: Troy Montana Posts: 3,940	Re: wiring question, probably the first of many to come in the next few months Randy, You will need to jumper the two purple 12ga wires. also if you want backup lights you will have to modify the two small green wires as the 4spd backup switch is on the transmission and the AT version is on the column next to the neutral safety switch connection

01-23-2012, 05:48 PM	#4
teeitup Just like to part out trucks!! Join Date: Nov 2001 Location: Meriden, Ks-North of Topeka 10 miles Posts: 27,395	Re: wiring question, probably the first of many to come in the next few months THANKS for the info Mark, Randy __________________ 67 Chev swb stepside 4x4 283 4 speed SOLD 72 blazer 4x4 4 speed Cheyenne 72 GMC swb 4x4 fleet 4 speed, original paint 1958 Cameo (one of 1405 built, it was my dads) 2020 chevy Apex 4x4 crew cab 1969 Z28 with the 302 1980 chevy swb 4x4 1964 chevell Malibu SS 1976 K20, sold new originally out of my dads chevy dealership Members that I've met, over 200 probably closer to 300 in the 12 years I've been on this site, everyone I met "It was a pleasure"

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