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Voltage loss

Tiny
JMAN88
  • MEMBER
  • 1996 FORD F-150
  • 4.9L
  • V6
  • 2WD
  • AUTOMATIC
  • 168,000 MILES
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?
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Saturday, August 1st, 2020 AT 9:37 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,755 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
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Sunday, August 2nd, 2020 AT 12:19 AM

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