Light weight wiring harness
12-28-2014, 12:36 PM
#1
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Light weight wiring harness Those of you that modified your stock wiring harness for all the crap you took out was it worth it? I've deleted the ac and hvac the abs is gone and so is the cruise control and maf sensor. How difficult was it? Where are the unplugging points? Does the abs and cruise and hvac all connect together to the engine harness? I just need a starting point for attempting this?
12-28-2014, 01:38 PM
#2
What I plan on doing is buying a spare harness and following each wiring and just taking out the ones I don't need and clean them all up and 're loom them. Whether it's a weight difference or not, probably not that much but it's less clutter under the hood and just less stuff that go wrong.
12-28-2014, 04:02 PM
#3
That would be a good winter job.
Not hard at all, start by taking your fuse boxes out and go from there.
You will see all the connection plugs. There's a big black junction box that goes through the driver's side firewall, that's the one that will be a bitch. Once the wires go into that junction box you can't tell which wire is which on the other side. You will have to ohm them out. The wires don't change color but you may have 3 blue wires in and 3 blue wire out. You can't tell which blue wire goes to which blue wire.
Or you just leave the junction box and cut you wires at the box.
Just takes some time. Sure cleans up your engine bay.
Not hard at all, start by taking your fuse boxes out and go from there.
You will see all the connection plugs. There's a big black junction box that goes through the driver's side firewall, that's the one that will be a bitch. Once the wires go into that junction box you can't tell which wire is which on the other side. You will have to ohm them out. The wires don't change color but you may have 3 blue wires in and 3 blue wire out. You can't tell which blue wire goes to which blue wire.
Or you just leave the junction box and cut you wires at the box.
Just takes some time. Sure cleans up your engine bay.
12-28-2014, 10:12 PM
#5
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This is something I was also planning on doing this winter. I was thinking of starting with the engine bay harness, then move on to the engine harness, and then move on into the interior. Removeing abs, traction control, cruise control, wheel sensors, washer pump, AC, air pump and EGR circuits. Moving on to the inside, when I do my cage since and the interior will be gutted anyway. I will remove the air bag, seat harness and what ever else I can fine. I will also take the time to rewire some other stuff like the nitrous, wide band and t-brake at the same time. I'll collect all the wiring and weigh it and post it here.
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12-30-2014, 12:43 PM
#8
I relocated my underhood harness inside the car and under the dash. It is a major pain in the ***, but with that being said, I am still very glad I did it. Not only did I delete a TON of things that my car was not using (A/c, hvac, radio, power seats, etc, etc) but if you bring the loom inside the car, you basically get to cut about 10ft of wires out of a loom that contains about 20-25 wires. End result? I literally lost 20lbs of weight out of the car in wires/connectors alone. And the engine bay looks much less cluttered, and much more purpose built. Glad I did it, but would never want to do it again, haha.
12-30-2014, 02:12 PM
#9
You have any pics of your setup under your dash? I was thinking with the passenger airbag removed I would have alil more room to mount stuff there and it will be hidden.
Also thought about mounting some things on the glove box door and making slits for the wires to go through so when the door was opened it wouldn't pinch or stretch any wires. So many things can be done with the wiring if you have the time and patience.
Also thought about mounting some things on the glove box door and making slits for the wires to go through so when the door was opened it wouldn't pinch or stretch any wires. So many things can be done with the wiring if you have the time and patience.
12-30-2014, 06:46 PM
#11
You have any pics of your setup under your dash? I was thinking with the passenger airbag removed I would have alil more room to mount stuff there and it will be hidden.
Also thought about mounting some things on the glove box door and making slits for the wires to go through so when the door was opened it wouldn't pinch or stretch any wires. So many things can be done with the wiring if you have the time and patience.
Also thought about mounting some things on the glove box door and making slits for the wires to go through so when the door was opened it wouldn't pinch or stretch any wires. So many things can be done with the wiring if you have the time and patience.
12-31-2014, 12:16 PM
#13
Yeah I have had the firewall delete done for quite a while now, but I just had it off to run the wires through. Here is a picture of it. I just took cardboard to get the shape and size, and then I used two pieces of aluminum sheet riveted together, and just bolted her on in. (One piece was not sufficient in thickness by NHRA standards for a firewall)
05-28-2015, 11:30 AM
#17
I am going to bump this up because I am starting this project. Deleted enough stuff out of the front of the car finally to make this a very reasonable mod. I don't want to relocate the fuse boxes yet. Just want to get rid of the unnecessary things that I have deleted. cc, abs, ac, went speed density, evap and other little things.
So any more tips from people who have done this? Am I wrong in thinking I can buy a spare engine harness and follow all the wires to where they pin into the connector and un pin it and then with the wires I have left just unplug my current engine harness and plug the new one in?
So any more tips from people who have done this? Am I wrong in thinking I can buy a spare engine harness and follow all the wires to where they pin into the connector and un pin it and then with the wires I have left just unplug my current engine harness and plug the new one in?
06-02-2015, 05:28 PM
#18
So any more tips from people who have done this? Am I wrong in thinking I can buy a spare engine harness and follow all the wires to where they pin into the connector and un pin it and then with the wires I have left just unplug my current engine harness and plug the new one in?
Layout the complete harness and label BOTH ends of all wires. Then start marking PULL or STAY. From there it makes it an overall easier and cleaner process so you can buy replacement loom, sleeves, cable clips, etc. Then you pull them exactly like you said, unpin from PCM side and start working it out from there to the end. Clean up all grounds while you have it out.
06-28-2016, 10:02 PM
#20
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Old thread bump. I ran out of time to do this last winter but there is some weight savings to be had. For now I just cut the stereo/amp/antenna wire that runs along the passenger door all the way to the back of the car. Easy to delete and was worth around 4-5lbs IIRC.