Yes, I just tested everything again. I was a bit off on the diagram I provided (corrections below). I have 4 of the same to swap out with, one for ECU relay and one for the Fuel Pump relay from the old wire harness and two others from the new/used harness I just put in. All of the relays seem to work fine on ECU circuit but not on Fuel pump. Jumping the relay causes the fuel pump to kick on, but just run and run and run (normally it runs for a few seconds and then stops.
I tested each relay and they all seem to test fine. They were tested by providing power and ground from the ECU circuit. Each side was tested for voltage and resistance. On the switch side of the relay I had an average resistance of 100 ohms. Testing for voltage with (lead on ground) I had approx 11.52-11.6V on power and 0.16v on ground side. On the load side of relay resistance with power off was OL and 0.1 ohms with key on. All but one of these relays were very close to each other.
I went back and tested for power a fuel pump See picture below. Upon key turn I got: on red/blk wire 10.75V. On the yellow/red wire I got 0v. ground tested 0.001 ohm resistance(or checking for cont, it beeped). Someone correct me if I’m wrong but the red/blck is power suppy (which it has), black/white is ground and yellow/red is signal?
On the connector red/black connects to black/teal, yellow/red connects to red/white (and has good con straight to fuel pump relay, 0.1 ohms resistance), Black/white is connected to black/yellow (tested good to ground). There is also a 4th wire on the wire harness side brown/black and is connected to what looks like a terminator/blank cap. Both new and old fuel pumps are the same.
I checked the tip sensor and is installed correctly with arrow pointed up.
Tested for spark and ****No spark**** this thing keeps getting worse.
03' 636 Fuel Pump Circuit Trouble
Linear Mode
