Engine Harness Modification

[Paparazzi]

Hi Guys,

I have spent numerous days searching for the answer so I didn't waste anyone's time, however the answers I have found do not point directly to my needs. Please excuse me if I am missing something or have passed over a helpful thread.

I am curious about engine harness modification, specifically deleting all unnecessary items from the harness. I have seen this touched on in many people's threads but never openly addressed straight forward. I am doing a swap, I purchased both tranny and engine harness from wiring specialties to get my RB swap rolling. BUT, I want to address the front harness (that includes the engine fuse box, lights, and runs along the driver side inner fender to the floor area of the driver side foot well.) As well as a more general question for any harness modification.

I no longer have washer fluid reservoir, AC, heating, radio, or speakers in the vehicle, and I want these wires out. I am meticulous and can pull each wire at a time correctly, I just want to know if say I trace all the AC wires around the car and remove all of them, speaker wires, etc. will I run into issues? What is the proper method of modifying or deleting items from a harness, just snip at the clip/plug and seal closed?

Again I appreciate any help and direct answers to harness modification, or a point in the right direction.

[andrew600]

I'm literally about to start this today after work. Trace it back to where it starts and remove it. It's simple. It's just time consuming. You might run into Ts and just trace them accordingly

[Paparazzi]

Haha I know I just started last night, split the loom and started going. So I can trace the wires back to the clip and just de-pin/cut out? I guess I hoped it was that easy, but thought there might be more involved.

[JDMRIDDAZ]

u need to mark what u want to keep and what u want to remove
and take harness out of car then cut it all out
block off all cut wires
then reinstall harness...
theres two main harnesses in a s13 inside and front outside with fuse boxes

[Paparazzi]

Excellent, thank you for the input. So it really is as easy as I thought, just snip and move on. My concern was that some items would share a similar fuse/relay, like AC for example. It has 3 blue wires and 1 green running from the relay. I snipped these out due to lack of AC anything, then removed the wire to the fuse, the the power from the fuse to the main block where the power is run from the battery. Make sense? haha

[andrew600]

yep makes sense.
the way im doing it since i have most of my front end cut off. is i have everything marked and layed out where it needs to be. and im just unlooming and removing wires all the way back that i dont need.

i havent decided if im going to relocate the fuse boxes yet. still to be determined. but ill throw up some pics tonight and update this thread. its pretty easy its just time consuming.

[Paparazzi]

agreed, I am going to relocate to at least under the dash, if not under the rear deck lid. I should get some pics up to. I agree I was going to just lay it all out and rewire the whole damn thing, make life "easy"

[EnemyS15]

I would definitely suggest doing this mod correct from the get-go. Do not just simply cut and cover.... go to the SMJ of each harness and de-pin from there. Some share ground points and certain other wires (like 12v amp etc), which then, you can only cut from where they join together as close to the junction as possible.


Do not ghetto cut and electrical tape..... It will only lead to gremlins and possible headaches down the road.

[Paparazzi]

I would definitely suggest doing this mod correct from the get-go. Do not just simply cut and cover.... go to the SMJ of each harness and de-pin from there. Some share ground points and certain other wires (like 12v amp etc), which then, you can only cut from where they join together as close to the junction as possible.


Do not ghetto cut and electrical tape..... It will only lead to gremlins and possible headaches down the road.

Thank you for the input, I think this is a good method, I actually have some small picks/interior picks/dental pieces I could use to de-pin . Thank you for update though, much appreciated!!

[andrew600]

yes absolutley im going to de pin properly. pictars tonight.