LS1 in a 72 Wiring Harness Help Me If You've Done One Before? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

dhpenner · 08-11-2012, 10:32 PM

I'm just laying out my stand alone harness for my LS. Can anyone tell me the best place to run the wires inside the cab? I don't need anymore holes in the firewall. If you've done a swap before please let me know. Pictures are always appreciated.

Thanks
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ETsC10 · 08-12-2012, 09:31 AM

We have a special area of the board devoted to these swaps...moving you over there.

C10_ustacould · 08-12-2012, 10:00 AM

I am installing a PSI stand alone harness right now and I routed mine into the cab like this...

mooseknuckles · 08-12-2012, 12:54 PM

same here...used the stock wiring harnes hole in the firewall....

RocketKing · 08-12-2012, 02:32 PM

I used the clutch linkage hole and mounted the ECM on the brake support.

ls1nova71 · 08-13-2012, 11:48 PM

Are you putting the PCM inside the cab, or just a few wires for gauges and ALDL connector?

dhpenner · 08-14-2012, 04:47 PM

I want everything in the cab and tucked way up. The clutch linkage hole is a good idea. I had it marked for filling but it might finally serve a purpose. Thanks for all your input.
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1moretoy · 08-15-2012, 09:13 PM

Bucksss- Where did you get your grommet? I can't find one anywhere and where are you guys mounting your computers?
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C10_ustacould · 08-15-2012, 09:17 PM

My grommet came on the PSI harness. I am currently building a mount that will be in the glove box area.

08-11-2012, 10:32 PM	#1
dhpenner Registered User Join Date: Feb 2010 Location: Canada Posts: 181	LS1 in a 72 Wiring Harness Help Me If You've Done One Before? I'm just laying out my stand alone harness for my LS. Can anyone tell me the best place to run the wires inside the cab? I don't need anymore holes in the firewall. If you've done a swap before please let me know. Pictures are always appreciated. Thanks Posted via Mobile Device

08-12-2012, 09:31 AM	#2
ETsC10 Hand Crafted C-10 Join Date: Aug 2006 Location: Burien, WA Posts: 5,180	Re: LS1 in a 72 Wiring Harness Help Me If You've Done One Before? We have a special area of the board devoted to these swaps...moving you over there.

08-12-2012, 10:00 AM	#3
C10_ustacould A day late and $1 short... Join Date: Dec 2008 Location: Northwest FL Posts: 3,870	Re: LS1 in a 72 Wiring Harness Help Me If You've Done One Before? I am installing a PSI stand alone harness right now and I routed mine into the cab like this... Attached Images __________________ Buck Instagram: C10_ustacould 1963 SWB Fleet Side 528 Desert Beige Milly 1967 SWB Step Side 506 Medium Blue The Old Girl 1968 SWB Fleet Side 503 Light Green Ellie SOLD 1965 SWB Fleet Side 507 Light Blue Prescription Strength SOLD 1971 SWB Fleet Side 521 White Shiro SOLD 1968 SWB Step Side 503 Light Green My Old Farm Truck SOLD

08-12-2012, 12:54 PM	#4
mooseknuckles Registered User Join Date: Sep 2009 Location: ottawa,canada Posts: 4,550	Re: LS1 in a 72 Wiring Harness Help Me If You've Done One Before? same here...used the stock wiring harnes hole in the firewall.... __________________ my build threads '86 C10 http://67-72chevytrucks.com/vboard/s...d.php?t=415628 '67 C10 http://67-72chevytrucks.com/vboard/s...d.php?t=635078 '63 GMC http://67-72chevytrucks.com/vboard/s...d.php?t=674682

08-12-2012, 02:32 PM	#5
RocketKing Registered User Join Date: Dec 2008 Location: Berryville, AR Posts: 792	Re: LS1 in a 72 Wiring Harness Help Me If You've Done One Before? I used the clutch linkage hole and mounted the ECM on the brake support. __________________ Rex

08-13-2012, 11:48 PM	#6
ls1nova71 Registered User Join Date: Dec 2009 Location: Independence Mo Posts: 4,117	Re: LS1 in a 72 Wiring Harness Help Me If You've Done One Before? Are you putting the PCM inside the cab, or just a few wires for gauges and ALDL connector? __________________ My '72 short bed build. http://www.ls1tech.com/forums/conver...6-0-4l80e.html 5.3 swap into my RUSTY '71 C10 http://ls1tech.com/forums/conversion...71-c-10-a.html

08-14-2012, 04:47 PM	#7
dhpenner Registered User Join Date: Feb 2010 Location: Canada Posts: 181	Re: LS1 in a 72 Wiring Harness Help Me If You've Done One Before? I want everything in the cab and tucked way up. The clutch linkage hole is a good idea. I had it marked for filling but it might finally serve a purpose. Thanks for all your input. Posted via Mobile Device

08-15-2012, 09:13 PM	#8
1moretoy Registered User Join Date: Jul 2008 Location: san jose ca Posts: 467	Re: LS1 in a 72 Wiring Harness Help Me If You've Done One Before? Bucksss- Where did you get your grommet? I can't find one anywhere and where are you guys mounting your computers? Posted via Mobile Device

08-15-2012, 09:17 PM	#9
C10_ustacould A day late and $1 short... Join Date: Dec 2008 Location: Northwest FL Posts: 3,870	Re: LS1 in a 72 Wiring Harness Help Me If You've Done One Before? My grommet came on the PSI harness. I am currently building a mount that will be in the glove box area. __________________ Buck Instagram: C10_ustacould 1963 SWB Fleet Side 528 Desert Beige Milly 1967 SWB Step Side 506 Medium Blue The Old Girl 1968 SWB Fleet Side 503 Light Green Ellie SOLD 1965 SWB Fleet Side 507 Light Blue Prescription Strength SOLD 1971 SWB Fleet Side 521 White Shiro SOLD 1968 SWB Step Side 503 Light Green My Old Farm Truck SOLD

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