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Wire on fuel pump is not getting power?

Tiny
TIMMY LEGENS
  • MEMBER
  • 1998 CHEVROLET TAHOE
  • 5.7L
  • V8
  • 4WD
  • AUTOMATIC
  • 220,000 MILES
Grey wire on fuel pump is not getting power, sending unit has power but fuel pump will not kick on.
Friday, October 4th, 2019 AT 9:55 AM

3 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good afternoon,

I attached a wiring diagram for you of the fuel pump.

You will need a test light or voltmeter to do some checks as to why the relay is not working.

Roy
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Wednesday, June 2nd, 2021 AT 2:49 PM
Tiny
TIMMY LEGENS
  • MEMBER
  • 3 POSTS
It shut off while driving so I assumed it was the fuel pump, replaced fuel pump and no luck that is when I started chasing wires. My next guess is the oil pressure switch or sensor.
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Wednesday, June 2nd, 2021 AT 2:49 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
No, the next step is to diagnose the issue, not replace parts.

You need to do testing. Do you have a voltmeter or test light to do some testing?

Roy
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Wednesday, June 2nd, 2021 AT 2:49 PM

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