Check the charging system. See if that voltage is flickering. Some vehicles, you may be able to brighten and dim the headlamps with dimmer control. I'm not talking about the dimmer switch.
Oct 2, 2011 at 7:29 PM
JDL
CAR REPAIR CONTRIBUTOR
16,098 POSTS
One of my vehicles does the same thing, in the dark, annoying as hell, isn't it? I'm an old retired guy, I don't get out much after dark. I haven't tracked my issue down ,yet. The alternator isn't very old, on mine, Different make and model.
Oct 2, 2011 at 7:35 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.