Hello all,

I am a new member that is currently installing a series 1 4-port manual JDM engine in a 1978 Triumph spitfire controlled by a Haltech elite 1500. the question I have is wiring related and refers to the engine harness connector C-18 (40 cavity bail lock connector located aft of the stock PCM). I have identified almost every wire that I need to go to the Haltech, but im baffled by the B/Y and R/Y wires in this connector and cannot trace the other ends in the engine harness. I am not using the OMP, Secondary Air Injection, Purge valve, stock MAF/IAC, or O2 sensors(replaced by wideband ones separately wired to ECM). I have looked all over Chiltons (the only recourse that I have right now) and can not find the schematic for this connector. Thanks

 

Connector is X-18 on wiring diagram

B/Y feeds a lot of stuff that you don't need to worry about from the ignition.... keyless control modules ...stuff that the ignition feeds
R/Y is the backup light switch power I believe

 

Well if that is the case it would explain why i cant trace the wires from any unplugged connectors. Seems like a round about way of powering the reverse lights. I appreciate the wisdom.

 

Not 100% sure.... but I can check on the weekend on the R/Y wire.

 

Any and all advise is appreciated

 

What are you trying to get working? With a standalone that's usually easier 🙄

 

Im curious as to what these two wires go to is all.