Interesting Minor Annoyance Help?

[Nula]

Interesting problem with my headlights, they sometimes flicker going down the road with almost no pattern. I can’t replicate it with bumps not manually by wiggling every part of the wiring harness I can reach without taking things apart. Another possibly related issue is my “key in ignition” warning chime comes on when the interior lights are on instead of just when the door is open. It comes on when I turn the interior lights on and when any door is opened. Which drives me nuts! It’s a pristine single owner truck with low miles, I’d like for everything to work as perfectly as I can get it. The headlight flickering is the actual issue, anybody know any fix? Can these be related? Even wiggling the wires to the headlight switch doesn’t replicate it!

 

[Gary Crist]

Check the body grounds....

 

[tripplec]

If you have DRL module. It can do it when its failed. Simply unplug it, usually located up front on a cross member near a head lamp fixture.