S15 Autech loom i to S13

[Marko13]

Hello guys, first post and first time on these forums, an i need some help i am having a hard time wiring up my S13.

I have an s13 with an s14 sr20, now i bought an s15 loom and autech ecu and ive connected most of it together the problem i am having right now is the body loom under the dash behind the glovebox needs to be wired up but i have no idea what wires go where, and then i found out the 3 plugs behind the passenger headlight in the engine bay are completely different.

I have been searching everywhere and even had a friend over to help me search for pinouts or wiring to help me but we had no luck, so to cut it down short i need a diagram for s15 loom into s13 body loom and them 3 plugs behind passenger headlight. If anyone can help ill appreciate it heaps.

Thanks.

[wao138]

my question is why are u tryin to connect a na sr20 ecu to a turbo sr

[Hoffman5982]

Yeah even if it was an s15 turbo harness and ecu it wouldn't work without changing to s15 coils and installing s15 injectors. The ecu you have probably requires smaller injectors and would require you to get rid of the CAS in favor of a distributor setup with plug wires. There really isn't any way of getting around it. Find a new harness and cut your losses.

[Marko13]

Autech is NA, my mechanic friend told me to get it because it would run better than my current ecu because i was missing the Vct, its pretty much plug n play apart from the body loom,

Edit: my car is NA aswel

[Hoffman5982]

The Autech is still a notchtop motor, and therefor has VCT. But people remove VCT all the time, so that shouldn't be an issue. Your best bet would be finding a wiring diagram for s15 SR to s13 chassis(good luck). Otherwise just pull up both FSM's and get to wiring. Maybe get in contact with Yuri at Wiring Specialties. He has a business to run so he may require you to send him the harness instead of just giving you the wiring diagrams, but I can promise it will be well worth the money, especially if you aren't capable of understanding the wiring diagrams enough to convert it yourself.

This is all under the assumption that the autech harness is the same as an NA s15 sr harness. They're the same motor with a few differences in the internals as far as I know. There really isn't a lot of information on these motors.

[Marko13]

Yeah ive been searching for days and all day today when ive finally decided to wire it and cant find a s15 to s13 diagram ill give yuri a try thanks man

[bidiaokais]

There really isn't any way of getting around it. Find a new harness and cut your losses.

[omgosh]

Youre just going to have to find both service manuals and check wiring diagrams. I just did that to wire up my S14 sr20de in my S14 , since it came with a cut harness. After 3 days of soldering and tracing wires , I got it done, but I wished I would have just paid the $400 for a Wiring Specialties harness..

[tokyowheels4real]

agreed, find a new wire harness. do it the right way