Quote:
Originally Posted by projectRDM
Nope. The ECU trigger is a ground, but the relay then switches power to the fuel pump. The black/yellow wire is the +12V signal from the relay to the pump. Black/pink is signal to the relay from the ECU.
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zomg. I should have looked at my relay before posting... yes, the black/yellow wire is +12v, and I believe the ground for the pump is a thick black wire with the pink "spots" every inch or so (standard Nissan ground coloring). There's also a couple smaller wires for fuel level.
Pull the 4 bolts to the cover, look at the wires as they go into the fuel pump connector, and then check impedance between the + and gnd wires. 0 ohms/short means bad pump, and no conductivity (infinite ohms) means bad pump/wiring.