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Trust My Mechanic

Your Free Car Repair Advice and Auto Repair Help

Dim Headlights Troubleshooting

Austin Davis, November 7, 2012September 30, 2014

Hi,
I have a question about my Chevy S10. The lights and anything electrical continuously flicker. The voltage meter does the same thing. When it started out I could barely notice but it has started to get worse(lights continuously get very bright then very dim).

I thought it must be the alternator but the truck has never died nor the battery gone dead. Any suggestions?
Thanks,
Shawn

 

Howdy Shawn,

 

It is most likely a problem with the voltage regulator inside the alternator. The alternator can still be producing electricity to keep the battery charged, but the part inside the alternator that regulates how much electricity to send to the battery probably has a problem.

You can get a starter/alternator repair shop to just replace the regulator…..but if it was me, I would just replace the whole alternator. If one part of the alternator is worn out, chances are more parts are worn out as well.

An alternator shop should have a few of these alternators sitting on their selves to install for you……of course, get them to test YOUR old alternator on the vehicle and concur that the regulator is the problem BEFORE you remove it.

 

Blessings,

Austin Davis

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Auto Repair Questions dim headlights

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