What is the voltages reading at fuel pump when.

Tiny
ANONYMOUS
  • 1994 GMC SAFARI
  • 150,000 MILES

What is the voltages reading at fuel pump when is running?

Friday, November 16th, 2012 AT 7:22 PM

1 Reply

Tiny
JDL
  • EXPERT
  • 16,270 POSTS

Probably around 13 and 1/2 volts. At key on, your systems get battery voltage. Engine running, the systems get alternator voltage. There is a difference.

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Friday, November 16th, 2012 AT 7:52 PM

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