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Ok. First you can't "turn on" a relay. It is either working or it isn't. "several electrical accessories in the vehicle use relays to transmit the electrical signal to the component. If the relay is defective. that component will not function properly." ( Haynes Repair Manual, General Motors 1988-2002, p12-5) Your fuel pump relay should be located under the hood in the fuse box on the right (passenger side) of the car. It is a black square approximately 1" by 1". Replace it if your fuel pump isn't working as a cheap method of elimination.

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โˆ™ 2006-04-10 03:07:54
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Q: Where is the fuel pump relay in a 1990 Oldsmobile Cutless Supreme 3.1 motor and how do you turn it on?
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