Voltage loss

1996 FORD F-150
168,000 MILES • 4.9L • V6 • 2WD • AUTOMATIC
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JMAN88
  • MEMBER
  • 1 POST
When I'm driving down the road and have my head lights, A/C and stereo on my voltage goes from m to the 0 on my battery garage on dash. I have changed battery and alternator already and went through wires found POS cable with bare spot fixed it and I'm still having same problem?
Aug 1, 2020 at 2:37 PM
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JACOBANDNICKOLAS
  • ✓Experienced Mechanic
  • 110,240 POSTS
Hi,

I'm not sure where the letters are on the gauge. However, I would like you to check something for me. If it is dropping excessively, it could be an issue related to the alternator or the wiring to it.

Here is a test for the alternator output. Do this and let me know the results.

https://www.2carpros.com/articles/how-to-check-a-car-alternator

Let me know what you find.

Joe
Aug 1, 2020 at 5:19 PM
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