Question about 1999 Oldsmobile Silhouette

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1999 oldsmobile silhouette van won't start. no power to fuel pump

Getting spark, replaced the fuel pump. not getting any power to the fuel pump,replaced the fuel pump relay and still no power to the pump.

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  • ronaldr208 May 25, 2009

    no power with a test light at the connector at the fuel pump, hooked up a secondary fuel pump and a hose to the fuel filter to bypass all electrical conectors and the van starts and runs, just can't seem to get power from the relay to the fuel pump conector

  • Dar
    Dar May 11, 2010

    No power with a test light, or no pump running?

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I have a silhouette and it had the same problem
Follow the fuel pump wiring harness to where it plugs into the floor of the van--pull the connectors apart--they will probably be corroded, and you will possibly have to change both wiring harnesses or connectors.

Posted on May 25, 2009

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The use of a power probe is helpful for fuel pump diagnostics. The grey wire at the harness should show ground at rest, and if you apply 12 volts to it, the pump should run. If it doesn't the pump is bad.if it does run, look forward at the harness, floor connector, and then at the grey wire coming from the fuel pump relay. If there is power to the realy, and none out, replace the relay.

Posted on Sep 03, 2011

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  • Oldsmobile Master
  • 2,007 Answers

Then that wire must be broken some where. Did you try testing it every foot or so from the fuel pump connector back toward the relay? You have power at the relay? Your fuses are all good? I don't think this is a solution yet, but it wouldn't give me a "clarification" request.

Posted on May 25, 2009

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Posted on Jan 02, 2017

motor1258
  • 6674 Answers

SOURCE: Feul Pump Replacement for 1999 Olds Silhouette?

All you may have to do to confirm power to your fuel pump, is to turn the key to on (not start) and listen for a "humming" from gas tank area. If you hear a hum, you have power going to pump, if not, then start thinking relays, fuses etc. Do you get the "Hum". How did you arrive at it being pump for sure, what tests did you perform? Here's a link that will assist you.

http://www.autozone.com/shopping/repairGuide.htm?pageId=0900c152801dbaf3

Posted on Mar 04, 2009

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