Hello To All,
I have read multiple posts about this problem and can’t quite find the solution, so I find myself asking it on the Forum with the hope I can find a solution.
My car is a 1983 911SC, it would not start and I did not hear the fuel pump making the usual sound/s.
I replaced the pump with one from our host and I “STILL” hear only a click when the key is turned to the on position. The same sound I heard from the previous one I replaced, indicating to me perhaps the older pump was/is fine.
1. With a test light in hand, I had the key in the on position, connected it to the positive side of the FP, but “NO” light signal from the tester…..however, I did hear/feel the click from the pump, same as before.
I assume the click means it’s getting "SOME” power….am I correct, if so why not enough to power the test light, does the click indicate something to test for?
BTW, The wires on the FP are correct, black to positive etc.
2 .I then jumped terminals 67a and 30, turned the key to on and the pump started to run normally, not just click once.
3. I swapped the red relay with a known working “black” one…..no change to FP, still not running/priming with the key in the on position.
4. Checked fuses and connections at the fuse box, all seem good.
If/since the pump has an audible click it seems to be getting some power but not enough to run…..what else to test?
Best, Ben
Same issue:
https://forums.pelicanparts.com/porsche-911-technical-forum/767660-fuel-relay-clicks-fuel-pump-no-power.html