Fuel pump will not shut off

1990 FORD BRONCO
150,000 MILES • V8 • 4WD • AUTOMATIC
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BRONCOLOST
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The fuel pump wont shut off until it drains the battery or the battery is disconnected. I can't figure out the Chilton book. Need to know where the fuses are and the power wires.
May 5, 2019 at 4:58 PM
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SCGRANTURISMO
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Hello,

This sounds like you have a short to power somewhere in the wires going to the fuel pump which is located in your vehicle's fuel tank. Does your vehicle have 1 or 2 fuel tanks?

Thanks,
Alex
2CarPros
May 5, 2019 at 9:59 PM
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BRONCOLOST
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It has one tank.
May 6, 2019 at 1:49 PM
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SCGRANTURISMO
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Hello again,

In the diagrams down below I have included a wiring diagram for your vehicle's fuel pump as well the exploded diagram of the pump and a description of the EFI system. With the ignition key off I want you to take a voltage reading pin #86 of the fuel pump relay. I have included a link below if you are unfamiliar with how to use a multimeter.

https://www.2carpros.com/articles/how-to-use-a-voltmeter

Please get back to us with what your voltage reading and we will go from there.

Thanks,
Alex
2CarPros
May 6, 2019 at 3:09 PM
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BRONCOLOST
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The battery is completely dead and will not hold a charge because I didnt charge it during our cold Alaska winter I have to buy a new one next payday. I will have to get some help. To do the reading dont have a meter. I will let u know when it's done. Michelle
May 7, 2019 at 8:20 AM
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STRAILER
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Please let us know what you find. We are interested to see what it is.
May 10, 2019 at 10:43 AM
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BRONCOLOST
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I will.
May 10, 2019 at 10:12 PM