The 1947 - Present Chevrolet & GMC Truck Message Board Network

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The 1947 - Present Chevrolet & GMC Truck Message Board Network (https://67-72chevytrucks.com/vboard/index.php)

- LSx Swaps (https://67-72chevytrucks.com/vboard/forumdisplay.php?f=206)

- - harness routing (https://67-72chevytrucks.com/vboard/showthread.php?t=715742)

michael bustamante

08-26-2016 02:25 PM

Re: harness routing

cru_zn. thats what iu like to see.. nothin... lol
I like that idea. running everything under the dash. i take youi installed the fuse box after you ran the wires thru the firewall?

cru_zn_29

08-26-2016 09:41 PM

Re: harness routing

Yes

Chris Coufal

08-28-2016 12:01 AM

Re: harness routing

1 Attachment(s)

My computer is mounted behind the gauge cluster and the harness goes through the firewall below the intake so it's barely visible. The fuse box will be under the dash as well.

Willie Makeit

08-28-2016 09:36 AM

Re: harness routing

Quote:

Originally Posted by cru_zn_29 (Post 7693349)

I used the truck harness that came with my 5.3 LY5. I took it apart and shorten to fit my truck mounted ECM & TCM inside the firewall by the original A/C box. You can see the harness going through the fire wall to the added on extra small fuse box i don't like to see wires when i open the hood.

very clean! :metal:

What is the rubber wire flex-conduit from?

JJH Jimmy

08-29-2016 04:38 PM

Re: harness routing

4 Attachment(s)

I mounted the ECM under the dash mounted to the brake pedal bracket. I used the hole that was for the clutch linkage for the wiring harness. It is the factory length harness.

michael bustamante

08-29-2016 06:45 PM

Re: harness routing

jjhjimmy. that is clean man. I really like that. thank you!!

cru_zn_29

08-30-2016 03:50 PM

Re: harness routing

Quote:

Originally Posted by Willie Makeit (Post 7696338)

very clean! :metal:

What is the rubber wire flex-conduit from?

I am not sure. My brother grabbed a few different ones at a wrecking yard. I will see if i can find out.

rmv23887

08-30-2016 03:51 PM

Re: harness routing

I like your idea Battery on DS, how did you do the battery box?

Quote:

Originally Posted by ls1nova71 (Post 7691366)

I always use truck harnesses. I mount the PCM under the driver side front fender. There's pics of them in my build threads. This is my Blazer, but its kind of hard to see the harness in pics.

Willie Makeit

08-30-2016 04:32 PM

Re: harness routing

Quote:

Originally Posted by cru_zn_29 (Post 7699134)

I am not sure. My brother grabbed a few different ones at a wrecking yard. I will see if i can find out.

thanks!

ls1nova71

08-30-2016 10:06 PM

Re: harness routing

Quote:

Originally Posted by rmv23887 (Post 7699137)

I like your idea Battery on DS, how did you do the battery box?

My Blazer has a factory 67-72 auxiliary battery tray, but I have cut the right side ones apart and rewelded them back together the opposite way to fit the other side before. The auxiliary tray is easier if you can find one though.

Chris Coufal

08-31-2016 01:06 AM

Re: harness routing

JJH Jimmy......what grommet is that from for the firewall harness pass-thru

JJH Jimmy

08-31-2016 03:13 PM

Re: harness routing

Quote:

Originally Posted by Chris Coufal (Post 7699649)

JJH Jimmy......what grommet is that from for the firewall harness pass-thru

I don't have a part number, but i just measured the o.d. of the harness and the i.d. of the hole on the firewall and ordered several close sizes from McMaster Carr. They are cheap. The hardest part was stretching it over the ECM connectors.

Quote:

Originally Posted by ls1nova71 (Post 7699535)

I cut my original apart and swapped the sides. Thanks for the idea!

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