Author Topic: Test Fuel Pump Connection (Read 3549 times)

txleadfoot · « **on:** April 18, 2008, 12:09:50 PM »

How do I test the electrical connector at the fuel pump with a multimeter? I can't get a reading on any of my running 318s with the ignition on.

Cobra Jet · « **Reply #1 on:** April 18, 2008, 01:13:26 PM »

I'm gonna say do a KOEO test (key on engine off) - once you have the car on and there is power, you should be able to get a 12 volt reading at the connector IF power is going to it. Set your mult-meter to "DC", then take the multi-meter leads and touch the fuel harness metal prongs within the connector... if everything is fine, you should see some sort of read out on the multi-meter.

RED IS 91 · « **Reply #2 on:** April 18, 2008, 03:43:23 PM »

Make sure your testing the pump leads and not the fuel guage leads.The two in the photo are the pump leads.

good luck

txleadfoot · « **Reply #3 on:** April 18, 2008, 05:57:04 PM »

I get nada. Even tried using the chassis as a ground. Also tried another working multimeter. This is on 3 cars, two of which are running. I'm stumped. Yes, it's the wiring at the pump, not the fuel level sender.

Thanks for your help,
Shaun

RED IS 91 · « **Reply #4 on:** April 18, 2008, 06:37:41 PM »

Check your relay?

txleadfoot · « **Reply #5 on:** April 21, 2008, 09:49:10 AM »

Thanks for the help guys. I discovered over the w/e that there is no juice to the fuel pump. It appears to have been cut previously at the connector end, so I will start there. Is that wire set part of a larger harness, or can it be replaced with a factory section?

ak96ss · « **Reply #6 on:** April 21, 2008, 06:30:07 PM »

IIRC, it is part of the whole harness coming from the front.