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4th replaced fuel pump won't come on

Tiny
FARMER'S DAUGHTER
  • MEMBER
  • 1999 BUICK CENTURY
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 150,000 MILES
1999 Buick Century Custom V-6 3.1 Litre 2 Wheel Drive ---
fuel pump measuring only about 5 volts and not coming on. Any suggestions, please?
Sunday, January 9th, 2011 AT 12:30 AM

2 Replies

Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
The fuel pump relay has a "prime" terminal coming off it. You can apply 12v to it to see if that gets you 12v at the pump. That will isolate the bad part of the circuit.
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Sunday, January 9th, 2011 AT 1:10 AM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Check and test the fuel pump relay, the computer control of the FP relay circuit and the fuel pump and oil pressure sending unit-
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Sunday, January 9th, 2011 AT 1:12 AM

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