The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > General Truck Forums > Engine & Drivetrain > LSx Swaps

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 10-08-2018, 02:45 PM   #1
scoobiedoo01
Registered User
 
Join Date: May 2018
Location: Waterloo
Posts: 13
LS swap with PSI wiring harness

I'm in the middle of installing the wiring harness from PSI into my 67 C10. Running a L92 with 6L80 trans. My main question is which wire do I tap into behind the ignition switch on the dash that would go with the Ignition Feed wire from the PSI wiring? It calls for 12v in start position and also in accessory but no power when off. Does anyone have a picture of the exact wire from the back side of the switch where the wires come out?

Thanks much!
scoobiedoo01 is offline   Reply With Quote
Old 10-08-2018, 03:13 PM   #2
Low Elco
Registered User
 
Join Date: Apr 2003
Location: Indep, MO
Posts: 5,893
Re: LS swap with PSI wiring harness

I used the big purple. That's the excite to the starter. Pick it up after the Neutral Safety Switch on the column, if you have an Automatic.
Low Elco is offline   Reply With Quote
Old 10-08-2018, 03:32 PM   #3
scoobiedoo01
Registered User
 
Join Date: May 2018
Location: Waterloo
Posts: 13
Re: LS swap with PSI wiring harness

My truck was originally a 6 cylinder manual 3 speed on the tree. I do know I need to add a neutral safety switch but didn't come with one.
scoobiedoo01 is offline   Reply With Quote
Old 10-08-2018, 06:32 PM   #4
ls1nova71
Registered User
 
ls1nova71's Avatar
 
Join Date: Dec 2009
Location: Independence Mo
Posts: 4,117
Re: LS swap with PSI wiring harness

I'm sure your harness came with an ignition relay, right? If it didnt you will need to add one, but if it did, then you will turn that relay on with the wire that originally went to the coil. The pink wire in the top of the pic.
Attached Images
 
__________________
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
ls1nova71 is offline   Reply With Quote
Old 10-09-2018, 10:04 AM   #5
scoobiedoo01
Registered User
 
Join Date: May 2018
Location: Waterloo
Posts: 13
Re: LS swap with PSI wiring harness

Okay. That was the wire I had figured but good to confirm it.

Thanks much!
scoobiedoo01 is offline   Reply With Quote
Old 04-06-2020, 01:16 AM   #6
sportfish69
Registered User
 
Join Date: Mar 2013
Location: houma, louisiana
Posts: 25
Re: LS swap with PSI wiring harness

Where did you go thru the firewall with your harness?
I will be adding vintage air system and don't want to cut a hole in the wrong spot.
sportfish69 is offline   Reply With Quote
Old 04-06-2020, 01:27 AM   #7
scoobiedoo01
Registered User
 
Join Date: May 2018
Location: Waterloo
Posts: 13
Quote:
Originally Posted by sportfish69 View Post
Where did you go thru the firewall with your harness?
I will be adding vintage air system and don't want to cut a hole in the wrong spot.
I went through the fire wall in the existing clutch rod hole since I was converting to an automatic and wouldn't need that spot anymore. Worked out perfect.
Posted via Mobile Device
scoobiedoo01 is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 10:50 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com