lights flicker upon startups- '04 Blazer - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**VetteVet** · 10-30-2015, 10:00 PM

This most often points to a voltage regulator issue. Of course it's in the alternator, before you buy a new alternator try checking all the connections to the alternator including the plug and the wire(s) in it.

With a fully charged battery I would disconnect the alternator wiring and start the car to see if the flickering happens. This would isolate the alternator from the system as a cause.
You most likely will see some codes relating to no charging but they can be reset.

10-30-2015, 10:00 PM	#7
VetteVet Msgt USAF Ret Join Date: Jan 2005 Location: Kalamazoo, Michigan Posts: 8,709	Re: lights flicker upon startups- '04 Blazer This most often points to a voltage regulator issue. Of course it's in the alternator, before you buy a new alternator try checking all the connections to the alternator including the plug and the wire(s) in it. With a fully charged battery I would disconnect the alternator wiring and start the car to see if the flickering happens. This would isolate the alternator from the system as a cause. You most likely will see some codes relating to no charging but they can be reset. __________________ VetteVet metallic green 67 stepside 74 corvette convertible 1965 Harley sportster 1995 Harley wide glide Growing old is hell, but it beats the alternative.



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