sr20det harness swap

[bonestocksr20]

my friend just bought a black top sr and they gave him the original chasis harness. well he gave it to me since my wiring in my car is terrible (previous owner) i was wondering if the black top harness matches the red top and will the harness be plug and play or will i have to cut it too. his harness came with everything, plug for the gauge cluster, both fuse boxes all plugs, ecu connect, ect.... please let me know so i can get my ratty *** electrical out Robert
Modified by bonestocksr20 at 9:53 PM 2/28/2008

[bonestocksr20]

wow nobody knows? i think i can make it work just wondering how much work it would take

[david200095367]

if its an early s13 blacktop you wire it up the same way like a redtop. You will have to make a couple of adjustments.

[Hijacker]

Why did they switch out his chassis harness? But so long as you have a USDM chassis harness, you should be good to go. If it's JDM, the Super Multi-Junction plug will be on the wrong side of the car.

[bonestocksr20]

no this harness came off a 1997 jdm 180sx right hand drive. it is going in a 1993 USDM 240

[Hijacker]

Unless you hate life and happen to have a complete and total understanding of how the harnesses are put together, you'd do yourself, and your life span, a favour to steer clear of doing that job.

The S14 and S13 harnesses are not compatable. you could conceivably splice the harnesses together with the S13 plugs and a lot of soldering/rerouting, but unless you happen to be a master auto electrician, it's not a task that would be fun and exciting.

That point aside, the JDM and USDM harnesses are routed differently. The wonderful and "fun" Super Multi-Junction plug is always on the driver's side of the car. It is the linking point for the interior main harness to hook up with the engine bay main harness. So you can imagine how many power wires, signal wires, and test wires go through that. You would have to lengthen and solder more wires than you'd care to count.

[david200095367]

i think the ecu will need to be repinned if your using a redtop ecu on a late s13 harness.

[Hijacker]

i think the ecu will need to be repinned if your using a redtop ecu on a late s13 harness.

He's not talking about the EFI harness.

[schanne]

Ok, you purchased a harness from a late model sr20 blacktop (97-98). I have that (late) model motor and purchased the early wiring harness. Your gonna have to repin the ecu like David said. There is a couple plugs to switch out as well. Go to heavythrottle.com or frsport.com for the wiring instructions. I had to do things the complete opposite. Research on how to repin the ecu and your golden!