On the stock primaries there are two wires. One that is a greenish color and one that is a bit larger black with a stripe. Which is power and which is ground?

Thanks
-Morbius

 

One is always ignition switched 12v power, and the other is the wire that goes back to the ECU, which "pulses" the line to ground to make the injector fire.

The black/stripe is probably the power wire.

BTW, it doesn't matter which wire goes to what terminal on the injector, and if you're adding a resistor to run low impedance injectors, you can add it to either wire.

Dale

 

I didnt figure it mattered .....Wiring up the Haltech and figured I would try to get it right. Damn this wiring is a PITA....


Thanks
-Morbius