Question about 1991 Ford F350

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Where is the fuel pump relay on an F350 Ford Diesel 7.3L Engine. One posted said it was behind the radio and the radio has a special tool required to take it out. The truck died over a week ago. We thought it was the computer module which we just replaced. No wait to start light. Think it may be this relay.

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  • Ford Master
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According to Haynes Diesel Repair Manual the fuel pump relay is mounted on the inner fender (doesn't say which side). The fuel pump inertia switch should be found under the dash to the right of the transmission hump and near the heater case. Depress the button on top of it to reset it. Hope this will help.

Posted on May 09, 2010

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