Buzzing noise

1992 CHEVROLET 2500

226,105 MILES • 5.2L • V8 • 4WD • AUTOMATIC

YESENIA CAMPOS

MEMBER
1 POST

When the car is off there is a buzzing noise coming from underneath. Kinda by the fuel pump. It doesn't shut off unless the battery is unhooked. We don't want the battery to drain. Please help.

Aug 25, 2019 at 7:23 PM

SCGRANTURISMO

✓ASE Certified Mechanic
4,897 POSTS

Hello,

This sounds like you have a short to power somewhere in your vehicle's fuel pump circuit. In the diagrams down below I have included a wiring diagram for your fuel pump circuit and a guide for how to find shorts to power in an automotive electrical circuit. You will need to use a digital multi-meter to do this, so here is a link describing how to do this, if needed:

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

Please go through these guides and get back to us with what you find out.

Thanks,
Alex
2CarPros

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Aug 26, 2019 at 4:20 AM