7.8 volts present at fuel tank


Asked by Jul 31, 2016 at 09:08 AM about the 1989 Ford F-150 S Standard Cab 4WD SB

Question type: Maintenance & Repair

Pump doesn't run, replaced relay, pump does run when 12
volts is applied directly to pump. Haven't replaced EEC
relay. Why am I not getting 12 volts at connector?

3 Answers


get a wiring diagram and work backwards with your test light- that is an old truck, I wonder if it has an inertia kill switch?

1 out of 1 people think this is helpful.
Best Answer
Bob Beaman

Have you checked or substituted the fuel pump relay?

1 out of 1 people think this is helpful.

Thanks guys for the quick reply. It does have the inertia kill switch, it is good, checked continuity. I did replace the fuel pump relay, it was bad.

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