Every time I try and switch out my fuel pump relay to try another one it starts making a rapid quick noise. Can anyone tell me why, please?
Aug 17, 2022 at 7:49 PM
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STRAILER
✓ASE Certified Mechanic
54,837 POSTS
It will do this if the fuel pump is pulling too many amps or the there is a bad connection. Here is a guide to help you check and the wiring diagrams so you can see how the relay works and how it is wired:
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