Have noticed a pulsating in my headlights and interior lights on my Chevy Tahoe. The technician said a loose negative post on the battery. He tightened and the problem seemed to have disappeared for a day. The pulsating is now back when engine is revved or when breaking. Wondering if anyone has had any problems with alternator or regulators.

Thanks!

 

Welcome to the forum.

Might check other main grounds.

 

May need to check both ends of the negative ground cable it could be loose or corroded at the block connection..

 

I have developed the same problem. Did you ever find a fix?