hello all, i have searched the forum but cannot seem to find the answer
81 fuel inj auto trans
pump tests good on bench. dual relay clicks, all fuses good in the 2 inline fuse holders. afm propped open.....no power to wire at pump. Question: what color are the wires in the inline fuel pump fuse holder? all suggestions appreciated!
No power to fuel pump
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riverdadd
- Patron 2018
- Posts: 206
- Joined: Thu Sep 11, 2014 6:16 am
- Your car is a: 1975 Fiat Spider 1977 Alfa Spider
-
riverdadd
- Patron 2018
- Posts: 206
- Joined: Thu Sep 11, 2014 6:16 am
- Your car is a: 1975 Fiat Spider 1977 Alfa Spider
Re: No power to fuel pump
So i continued to dig through the forum and here is the answer!!! i had removed the rear light to replace it due to a busted lens.....so it wasnt grounded!!! doh
Re: Fuel pump, or electrical problem?
Postby spider2081 » Sat Aug 01, 2015 5:35 pm
If you have no voltage across the fuel pump terminals and then when you move the meter ground to the cars metal you measure 7.85 volts when cranking, I would suspect the fuel pump ground is disconnected in the trunk. It usually grounds to one of the drivers side tail light mounting studs. I think the small terminal on the pump is ground. try grounding it with a jumper and see if it runs while cranking.
7.8 volts sounds a little low also but I would think the pump should run even at that low a voltage.
Re: Fuel pump, or electrical problem?
Postby spider2081 » Sat Aug 01, 2015 5:35 pm
If you have no voltage across the fuel pump terminals and then when you move the meter ground to the cars metal you measure 7.85 volts when cranking, I would suspect the fuel pump ground is disconnected in the trunk. It usually grounds to one of the drivers side tail light mounting studs. I think the small terminal on the pump is ground. try grounding it with a jumper and see if it runs while cranking.
7.8 volts sounds a little low also but I would think the pump should run even at that low a voltage.