Post by
chockrl »
https://forums.nicoclub.com/chockrl-u37344.html
Fri Oct 13, 2006 1:01 pm
When doing the wiring for my swap, RB20DET manual into 1990 S13 SE automatic KA24E, I gathered all the guides and howtos. But none are comprehensive, nor complete. So I double and triple checked wiring diagrams for both the R32 and S13, and completely disassembled the skyline harnesses I wasn't using. Which helped trace where and what wires connected to. I did have the complete clip, and having the chassis harness helped. I also had to search forums to figure out a few wiring connections, believe Skillzilla had to hook up the engine cranking signal to the RB ecm, which is described in this forum but not in his write-up (not discrediting his write-up or singling it out, just an example).
The engine cranking signal is the OR wire in the S13 gauge connector, under the dash to the right of the glove box. It needs to be connected to connector P of the R32 ECCS harness, one of the three connectors by the two relays really close to the ecm itself. It has 7-pins across and the engine cranking signal needs to be connected to the B/Y wire.
I am actually in the process of documenting all the wiring that I did to get my car running, by connector, wire color and function of the wire. Sorry I don't have it done to help you out though.