lq4 truck harness questions - LS1TECH - Camaro and Firebird Forum Discussion

Conversions & Hybrids LSX Engines in Non-LSX Vehicles
Sponsored by:
Sponsored by:

lq4 truck harness questions

Old 08-14-2011, 11:05 PM
Teching In
Thread Starter
iTrader: (3)
OutrageousZ's Avatar
Join Date: Nov 2004
Location: Bayville, NJ 08721
Posts: 30
Default lq4 truck harness questions

Hi, i have a lq4 truck harness with a th350 trans and was wondering whats the easiest way to get this to be a working standalone harness. Can i just hook up the sensors i want to keep and tuck the ones i don't want to the side. I'm not sure what to do with this fuse plug block (see pic attached) i read somewhere that you take all the red wires together and that goes to a switched power, all the pink to constant power and tie all blacks to ground. What about the rest of those wires and also what about the obdII plug to access the ecu?
Thanks for any help.
Name:  SANY0033.jpg
Views: 999
Size:  93.5 KB
OutrageousZ is offline  
Old 08-15-2011, 07:45 AM
TECH Regular
iTrader: (5)
Join Date: Feb 2010
Location: Celina, Texas
Posts: 456

If wiring does not scare you, here is what you do. It works out best if you have the engine on a engine stand. Plug in all the sensors you want. the ones you dont want check a schematic and remove them from the picture. the computer plugs come apart, easy to remove/reinsert the pins. Use zip ties to reroute the wiring. now would be a good place to locate the computer where you want it. Lengthen/shorten wires to connect to the computer. Be sure to solder, and heat shrink all connections. I used http://www.lt1swap.com/ plus I downloaded a printout of my harness. Here is what to expect.

Name:  001-4.jpg
Views: 1138
Size:  176.0 KB

Name:  002-4.jpg
Views: 1066
Size:  164.6 KB

Name:  006.jpg
Views: 728
Size:  199.3 KB

Name:  007.jpg
Views: 1940
Size:  245.1 KB

Name:  009.jpg
Views: 495
Size:  177.8 KB

Name:  011.jpg
Views: 568
Size:  160.9 KB

You will have wires left over that you removed, the nice thing is you can use this wire to extend wires to get the length you need. What I did on the wires that were to short was to cut the end off, keeping the correct color at the computer, add wire, so whatever you are looking at the colors are correct at the ends on the harness.
zipster is offline  
Old 08-15-2011, 01:31 PM
On The Tree
iTrader: (8)
Join Date: May 2009
Posts: 199

Yeah, i did the same as the above method just with a "Hidden" mentaility...

My start


If you have any questions just let me know, I have since done a few others so i know the truck harnessess well!

Marky522 is offline  
Old 08-15-2011, 01:50 PM
TECH Regular
pdsq98gt's Avatar
Join Date: Sep 2007
Location: Kansas City, MO
Posts: 430

That hidden harness looks really clean.
pdsq98gt is offline  
Old 08-15-2011, 01:55 PM
TECH Addict
iTrader: (2)
gofastwclass's Avatar
Join Date: Aug 2009
Location: KCMO
Posts: 2,855

Agreed, I may give that a go on my next harness.
gofastwclass is offline  
Old 08-16-2011, 03:57 AM
TECH Enthusiast
iTrader: (13)
welldonecj7's Avatar
Join Date: Apr 2008
Posts: 569

I have been debating and researching how to do it, that hidden look is one of the cleanest set ups I have seen, have any additional photos or how to write ups on how you did that?
welldonecj7 is offline  
Old 08-19-2011, 08:23 PM
iTrader: (5)
Join Date: Jan 2008
Location: Cleveland Oh
Posts: 251

The hidden harness looks real good...
pmgm is offline  

Thread Tools
Search this Thread
Quick Reply: lq4 truck harness questions

About Us Archive Advertising Cookie Policy Privacy Statement Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
  • Ask a Question
    Get answers from community experts
Question Title:
Your question will be posted in: