[Seeker]

I was browsing the US forum and, coincidentally, stumbled on this from their resident electrical guru (TeeRiver) regarding the fuel pump relay.

- R/W (Fuel pump power IN to relay) Should have 12v at all times, even with the key off.
- O/W (Relay coil power) Should be 0v with key-off, 12v with key-on and kill-switch set to RUN.
- Y/B (Fuel pump relay control) Controls the fuel pump relay, comes from the ECM. This signal is ACTIVE-LOW which means ON= 0v, OFF=12v. This signal goes LOW for the 1st three seconds after key-ON, then pops up to 12v. Do not let Y/B come in direct contact with solid 12v at any time else the ECM can be damaged!
- Y/R (Fuel pump power) This is switched power OUT from the relay to the fuel pump. If R/W = 12, O/W = 12v, and Y/B = 0v then Y/R =12 and the fuel pump will run.