Intermittent Voltage Drop

[Bobb_Ellis]

1996 Park Avenue, 190,000 miles.

I am experiencing intermittent voltage drops. Sometimes the drop causes the battery light to come on. This has been going on for months. No problem with the car starting.

I have changed the battery and the alternator as well as a speed sensor (trouble code).

Mr. Goodwrentch can't figure it out. I know it is not the guage as the lights dim when the voltage drops.

Any suggestions would be appreciated.

Thank you.

[eurohazard]

How do all the grounds look? Focus on the negative battery terminal and follow everywhere it goes. I'd remove the bolts, and clean the contact points with a wire brush.

[Bobb_Ellis]

Thanks for the suggestion. Grounds look good. No luck.