Fuel pump pwm

[matthunter1448]

I'm going to be using this. And was wondering are u able to use the fuel pump wire for this or do u have to use another output for the pwm and does the fuel pump wire still work as normal if u use another output for pwm?

[Rick Finsta]

Generally the FP power on signal wire still turns on the FPs main relay, and the PWM signal will be used by an external controller (or in the case of Fuelab pumps, this is onboard the pump itself) to vary pump speed. You could maybe use a SSR to power the pump but it would still be a good idea to have the FP on signal wire controlling the high current power into the pump (so if you used an SSR, then make sure the SSR's power side is only energized when the ECU wants the FP on.

[matthunter1448]

I'll be using two Ford fuel pump driver modules