1991 Oldsmobile 98 No power to fuel pump

Tiny
JASONTUCKER
  • MEMBER
  • 1991 OLDSMOBILE 98
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 130,000 MILES
I checked power at the relay and have power at contact #1 (switchable power from fuse thru relay to pump) but no power from the ecu to pin #5 (the power the throws the switch in the relay to close the circuit). All the contacts appear ok. The car cranks and has spark. Thanks.
Saturday, January 30th, 2010 AT 8:04 PM

2 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Sounds like the computer controlled circuit of the fuel pump relay is defective
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Saturday, January 30th, 2010 AT 9:13 PM
Tiny
JASONTUCKER
  • MEMBER
  • 2 POSTS
Yeah, that's what I was afraid of. I'm going to check the remaining inputs to the ECU tomorrow and the wiring/contacts for that circuit.

Thanks for your help. Working on Audis, VWs and Porsches all day has made my brain soft on American cars.
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Monday, February 1st, 2010 AT 12:18 AM

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