01 Bonneville All lights flashing fast

[therbs]

Hello all
I have an 01 Bonneville SE and after I start my car all my lights, interior, exterior and dash lights flash very fast. Several times a second. I am thinking it is a voltage regulator but alternator is only 5 months old. This has been going on for about a month now. Any ideas?

 

[melsg5]

would start with checking battery connections both at the battery and the ground and starter. Beyond that the BCM, body control monitor, would have to be checked.

 

[cammerjeff]

I wouldput a Voltmeter on the battery when the engine is running, if the Voltageis spiking and not a steady 13 to 14.5 volts it is the Voltage regulator and the altinator will need to be replaced again.
I stopped buying Altinators from the localname brand parts stores years ago for simalure reasons. A Rebuilt part used to mean that the complete unit was overhauled, bearings, diode plate, voltage regulator ect.... But now they seem to only "repair" what is actually broken on a part. Say 1 of the bearings were bad, so they replace the bearings, and clean and paint the part. So you get a pretty Altinator with 1 or 2 new parts, and the voltage regulatormay have 150,000 miles on it. But it comeswith a "life time Warrenty" so you can replace it for free every 6 months or so.
So do not be suprized if the Altinator is the issue.