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Fuel pump not working

Tiny
TJSKLS
  • MEMBER
  • 2000 CHEVROLET SILVERADO
  • V8
  • 4WD
  • AUTOMATIC
  • 97,450 MILES
What turns on the relay for the fuel pump?
Friday, January 4th, 2008 AT 1:53 AM

3 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
The computer called PCM/VCM etc. When you turn key to On-do you hear the fuel pump?
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Friday, January 4th, 2008 AT 6:46 AM
Tiny
TJSKLS
  • MEMBER
  • 6 POSTS
No I don't hear the pump. I can jumper the hot lead to the pump lead on the relay plug and the pump works and unit runs. What closes the circuit to the relay coil?
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Friday, January 4th, 2008 AT 10:03 AM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
What closes the circuit to the relay coil? The fuel pump relay control of the computer closes it thru pin 85 dark green/white to pin 86 black to ground. See below


https://www.2carpros.com/forum/automotive_pictures/12900_fuel_pump_2.jpg

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Friday, January 4th, 2008 AT 12:41 PM

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