DIY harness modifying(for those going MS)

[newaccorddriver]

well, ill be installing megasquirt soon enough, and im also in the process of doing a wire tuck. ill be finishing the wire tucking shortly after i get my car up and running since i cant even open my door enough to get the fenders off(damn single stall garage).

anyways, i first started by removing the entire harness and taking it inside to work on




as for where to start, i would recommend stripping out the injector portion of the harness first. just trace the wires back to the plugs and yank them out. if you cut the wires, theres a chance it might create a short or a fire if you start your car. this way theres nothing for the frame to touch since theres no more wire on the plug end.



heres what i took out



at this point, its really any way you want to do it, i decided to get rid of the TPS/EGR plugs since i wont be needing them




after that, your not going to need the O2 sensors, or the IAT sensors or CLT sensor, so you could pull the plugs on those as well




in the end, you should be left with something like this. pretty much a gutted stock harness. this is where the real challenge begins, the wire tucking. from here, you can relocate the fuse box to the glove box if you want, and since the harness is bare, its pretty straight forward to extending the wires to the plug that is probably hidden behind the fender or in the glove box. as far as the wire for the alternator charge wire goes, i would recommend you replace it with a completely new wire rather then trying to extend such a big gauge of wire.





in the end, the only things i kept were the alternator plugs, the starter solenoid switch, oil pressure switch and the dashboards coolant temperature sensor. the basics of what you would probably want to keep. im still not sure what the 'alternator RF input' wire does, but i left it in there just incase. the only thing left to do is to tape the rest of the harness back together and protect it with some wire wrap.



the ONLY thing i didnt get rid of was a part that looked like it had no real fuction at all, but since i have no knowledge of this part, i decided to leave it in place. if anyone know what the part in the picture below is, it would be greatly appreciated since i would like to know what it does and if i can remove it.




anyways, i hope you guys enjoy this since it really cleans up the clutter for those that are going to use MS and dont want the huge amount of wires that are going to nowhere.

[RamThis]

Wow, that basically leaves you with, well, pretty much nothing for wires lol.

Should be easy to tuck what, three wires?

[2oodoor]

this reminds me of gettin rid of all those vacuum lines with the weber conversion, for that matter there are quite a few wires I can get rid of too.
That black blade plug on the end of that one wire looks like AC related something something

[newaccorddriver]

this reminds me of gettin rid of all those vacuum lines with the weber conversion, for that matter there are quite a few wires I can get rid of too.
That black blade plug on the end of that one wire looks like AC related something something

i was thinking something along the lines of AC as well, but its hard to say. maybe its just a dead wire, or something that absorbs some RF noise?

[newaccorddriver]

Wow, that basically leaves you with, well, pretty much nothing for wires lol.

Should be easy to tuck what, three wires?

ya, i thought i was opening a huge can of worms until i looked at the clock and was surprised it didnt take like 5 hours or something. tucking should be easy now that i got rid of excessive amounts of wires that were/are useless for when i install megasquirt. and the wires for megasquirt will all be hidden as well