I've been picking at my wiring harness for the past couple of days. The CRX hasn't had an engine in it for quite some time, so I've had to rely on pin outs, write ups, hopes, and dreams.

I figured I might as well tuck the harness while getting everything together, but I'm stuck on a couple of connectors/wires.

I have a green connector on the back of the OBD1 B18A1 to the left of the oil filter. I believe this is the oil temperature sensor. Did the 90 CRX Si have this? I can't seem to find anything about it, or what to hook up to it from my stock Si harness.




Next I have a round, 2 wire connector that is home to a blue/yellow wire that goes to the 8 pin round connector by the injector resistor box, and a black/yellow wire that traces back to the 8 pin rectangle shock tower connector. I assume this should go to the EACV, just looking for confirmation.



Last one I have is a pair of wires with barrel connectors on the ends. One is yellow with a female barrel connector, and the other is green/black with a male barrel connector. Both trace back to the 6 pin rectangle connector on the shock tower.



Any help is much appreciated.

 

first picture - green sensor in B18 block is oil temp - not used on D16A6 - not needed for B18 in CRX
second picture - 2-wire connector with blue/yellow and black/yellow wires goes to EACV
third picture - back-up light wires - plug in at top of transmission

on the Si engine harness, you should have a connector that you don't need - it went to the Fast Idle Control Valve on the back of the D16A6 intake manifold - has 2-wire connector with dark blue (no stripe) and black/yellow wires - these wires are in the round 8-pin connector at the driver's side firewall by the resistor box

 

Awesome. Thanks a bunch.

Already depinned and gone

 

clarification: on the B-series transmission, the back-up light switch is on the bottom, not on top like D-series

 

ha i almost quoted you on that. i was like, "wait mines on the bottom"

but definitely good info though

 

my ankle is broken so i cant walk out and look at my crx but didnt he say in the shock tower, maybe he is talking aout the wire for the brake fluid resivour just a thought

 

just for clarification the green sensor on the block is a temp sensor used to kick on the fan even after the car has been turned off. Found on early b18's and Accord engines

 

I concur, I had to switch it out on the back of my B20 for my 91 ls one...

 

Just an update on the harness progress....

I've spent more time figuring out what connectors on the CRX harness went to what than I did physically doing anything with it.

I ordered a bunch of different sizes of heat shrink and that mesh loom that works like a chinese finger trap, but I'm going to wait to finish it up until I know it's wired right, lol.

Should have mounts in the next day or so, so I can at least bolt up the tranny and stick it in there to make sure my harness will physically work.

As soon as I have the spare funds I'm going to pick up a Rywire obd0-obd1 jumper and an O2 sensor, then I can make sure the harness works with no problems and get it buttoned up (there's a bunch of wires that need to be shortened as well).