Two problems I have with the loom on a 1992 EG2 JDM CRX
1) Secondary oxygen sensor has two wires - one is the braided steel outer, which is obviously an earth, but where does the other (core) wire connect into the loom? I assume it goes to the ECM somehow
2) There is a small sensor / pickup on its own bracket, at the front of the engine bay - two wires - pink from the ECU (shared with the alternator FR terminal), and brown. I need to know where the brown wire connects, and what the sensor is for. Cheers