wiring harness

hey guys im wanting to swap a 96 4.3 out of an s10 into my cj. i did get the harness but man their is alot going on there. im thinking of buying an engine harness from painless.

anyone have any input on this? does anyone else make an engine harness besides painless? anybody reused the existing harness?

thanks in advance

jeep

 

Lots of discussion on the subject of aftermarket and reused harness. Try searching "painless", and "ez wire", should get lots of hits.

Just bought, but not yet installed, the ez wire harness. Looks like its quality, and LOTS cheaper than painless.

 

Painless is the only one making an engine Harness as far as I know. One member just installed one into his stroker 4.6L I-6 powered Jeep. Pathkiller was the member IIRC.

 

What engine does your Jeep have now?

 

currently the engine is a 74 304. the jeep is wired with a painless wiring harness for (i think) the 76 and newer jeeps. i swapped in a gm column and had the electronic ignition kit from a 78 cj with a 304 so i bought a newer harness so i would be able to easily connect the upgrades.

the engine i want to swap in is a 4.3 from a 96 s10 blazer. it is cmpi. hope this helps.

jeep

 

What are you hoping to accomplish with this swap?

I ask because it's a surprising choice of engines for a '74. The AMC 4.0L would be the obvious choice if you had a 6-cylinder. I recall that Painless makes a harness for that engine.

 

I bought a ez wire harness for my 74 with a AMC V8 & told them I had a S-10 tilt column & needed the wirng for that & it came with everything I needed for Winsheld Wiper,Blinkers,Horn & ignition ,, Plus what gages I had as far as lights go,,Everything was color coded & had the name of what it went to every 6 inchs,, Looks easy to hook up a old welder like me shouldnt have to hard a time doing,, I think it was a 21 circuits so ill have room to add on like Radio or Heater or Heated seats maybe,,,

 

I got my harness from these guys I love it was quick and easy to install almost $200 cheaper then a painless

http://www.fuelinjection.com/

 

I have a 4.3 in my CJ-7 and used the Painless kit. It's pretty far from just plug and play, there was plenty of cutting and splicing wires but it all comes together and works very well. I've had it for over ten years with zero problems. My motor has a throttle body where yours probably has port injection making my system much easier to install than yours.

 

Whats your electrical skill level? Cutting down a factory harness from the 96 would be difficult (particularly so because its OBD2) but not impossible. I cut down a factory harness for my tbi with little trouble. With a copy of the service manual for both vehicles it can be done. Keep in mind computer mods may be needed to remove any antitheft devices from the ecu.

 

Mine's not an engine harness, it's a complete EFI system. Totally replaces the factory computer and sensors with GM-Delphi parts.

 

basically i got the engine,transmission and transfercase for 5hundy. the engine was rebuilt 10000 miles ago, and the whole package has about 120000 on it. so in the end i will end up with fuel injection and overdrive!

i wanted to use a 4 liter, but i really wanted an overdrive transmission. the biggest thing i hate about my jeep is the 3 spd is never in the correct gear. the engine is always over revving or lugging.

as far as my electrical ability i have done a tbi engine harness and i wired this jeep with a painless harness, i am not an electrician but work with wiring and schematics everyday. so i am sure i could make the original harness work, i am just trying to decide if two weekends in the garage sorting the harness out are time well spent compared to the 700 that painless gets for a new engine harness.

thanks for the thoughts so far guys!

 

The 4.0L came with an overdrive transmission, either the AX15 or the NV3550, depending on the year. Which transmission are you using? I'm not as familiar with the GM transmissions. I expect the V6 will allow you to move the rear of the engine forward some and fit a longer transmission, even an automatic, should you be so inclined.

 

4l60e
4 speed auto