1991 CHEVY BLAZER FUEL PUMP, SPARK BUT NO FUEL, TRK WONT ST

  • Tiny
  • Scottybkr
  • 1991 CHEVROLET BLAZER

Electrical problem
1991 Chevy Blazer 6 cyl Four Wheel Drive Automatic 160000 miles

At the back of the truck where the sending unit plugs into the wiring harness there is a two wire connection to the fuel pump. When you turn the key to the on position should one wire "gray" be powered for a few seconds and the other be constant or no power, or is that wire for the fuel gauge? I am trying to determine wether my fuel pump is good or not.

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Sunday, March 30th, 2008 AT 2:13 PM

1 Reply

  • Tiny
  • Rhall77
  • MEMBER

The other should be a ground. There should be another connection for the fuel level sender. But the wire that turns on for a few seconds, it sounds like the system is working fine.

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Monday, March 31st, 2008 AT 7:37 AM

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