PSI Harness firewall hole - The 1947 - Present Chevrolet & GMC Truck Message Board Network

terrylgreenjr · 11-19-2012, 09:44 AM

Im installing the harness this week and was woundering where everyone in drilling the hole in the firewall to instal the harness. I was thinking the best place for the ECM is right under the radio inside the cab. Im open to other locations just wanting to see what everyone else is doing

Crash_OK · 11-19-2012, 02:47 PM

This is what I did with mine..

http://67-72chevytrucks.com/vboard/s...&postcount=388

terrylgreenjr · 11-19-2012, 04:35 PM

Thats close to where I was thinking but my truck is a 77 so the dash is different, I was wanting to tuck it closer to the floor hump away from the pedals

**TR65** · 11-19-2012, 11:27 PM

Here is how I ran mine thru, a little higher up beside the brake booster. I used a Military bulkhead connector so I could pull the engine easily without disturbing anything in the cab.

TR

mooseknuckles · 11-25-2012, 01:07 PM

my 86 already had a 2" hole behind the motor, ran the wiring through it and mounted the PCM behind the glove box.....

11-19-2012, 09:44 AM	#1
terrylgreenjr Registered User Join Date: Jul 2011 Location: Dallas, TX Posts: 183	PSI Harness firewall hole Im installing the harness this week and was woundering where everyone in drilling the hole in the firewall to instal the harness. I was thinking the best place for the ECM is right under the radio inside the cab. Im open to other locations just wanting to see what everyone else is doing

11-19-2012, 02:47 PM	#2
Crash_OK Registered User Join Date: Nov 2011 Location: Edmond, OK. Posts: 1,362	Re: PSI Harness firewall hole This is what I did with mine.. http://67-72chevytrucks.com/vboard/s...&postcount=388 __________________ Mark ----------------------- Crash's 69 4x4 SWB Crash's Roof over Lake Home Crash's 1988 Land Cruiser Build

11-19-2012, 04:35 PM	#3
terrylgreenjr Registered User Join Date: Jul 2011 Location: Dallas, TX Posts: 183	Re: PSI Harness firewall hole Thats close to where I was thinking but my truck is a 77 so the dash is different, I was wanting to tuck it closer to the floor hump away from the pedals

11-19-2012, 11:27 PM	#4
TR65 Senior Member Join Date: Nov 2007 Location: Greenville, SC Posts: 873	Re: PSI Harness firewall hole Here is how I ran mine thru, a little higher up beside the brake booster. I used a Military bulkhead connector so I could pull the engine easily without disturbing anything in the cab. TR Attached Images __________________ 1965 C10 SWB Fleet Two owner LS2 Swap Thread http://67-72chevytrucks.com/vboard/s...d.php?t=413880

11-25-2012, 01:07 PM	#5
mooseknuckles Registered User Join Date: Sep 2009 Location: ottawa,canada Posts: 4,550	Re: PSI Harness firewall hole my 86 already had a 2" hole behind the motor, ran the wiring through it and mounted the PCM behind the glove box..... __________________ 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



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