When I say I jumped the fuel pump by the FSCM. I m referring to the FSCM module that s located near the spare tire mount under the truck. I m jumping pin 1 to 16 which both are grounds and jumping pin 32 to 47 (12vbattery and 12v for the pump) which does powers the fuel pump. Your wiring diagram is different from those I was using as a reference.
So, I believe my numbers are correct, with reading on the bottom of the relay. But I ll start referring to them as the wiring colors.
Dark green/white- is my PCM voltage. Which doesn t power for 2 seconds once key is turned on or while engine is cranking. But does have full continuity from the pin to PCM.
No sure where the constant power you are referring to? As I m under the impression it s only on when the key is turned for 2 seconds, while cranking and constant power when the engine is running.
My ground is good, as there is full continuity from the pin to the negative battery terminal.
Pin 87 for me is orange, which has full 12v all the time.
Pin 30 for me is the gray wire feeding the fuel pump. If I supply 12v to that pin (87 to 30) it powers my fuse #20 (also labeled as fuel pump) but the pump doesn t power on.
Another thing is, I still build some slight fuel pressure at the rail (haven t had a gauge to it yet) and can hear the fuel pump prime once but then it doesn t prime again. It did this once while I had my multimeter to pin 85 (dark green/white) PCM voltage, still didn t have power as the pump did prime.
Saturday, October 2nd, 2021 AT 10:50 AM