Headlights diming while driving
 

Anyone ever have a problem with the headlights diming and getting brighter randomly while driving?? I'm not sure what it could be I put a new alternator and new battery in right after Christmas

Its stock headlights and bulbs

I'm having my own issues with my new alt and newer battery and finding out that just because they are new doesn't mean they are good. I would test the battery and alt or take it to autozone or advance for free just to rule those two out

I'll have to check that out then

Make sure they get tested properly, i.e. with a load on them and not just testing for voltage. Even a small battery can have 12-14v. It's the load that matters.

So I'll turn the headlights and radio on when they do it

Go buy a cigarette lighter power plug adapter with wires on it and put it in the 12v power port and hook up a meter. See what the voltage is doing. I run about 14.5 volts cruising down the road. See if the voltage changes with the lights dimming. http://www.walmart.com/ip/41480035?w...710969&veh=sem

what brand alt did you install ?? Voltage regulator going bad

Regulator is built into the alternator right?

yep...

Don't remember but I got the receipt