I had this problem and it was a bad alternator.
Have your alternator checked out.
It can be the dimmer switch. It needs to be checked out./ A test light will check for voltage.
have the alternator checked. u are drawing to much current when using lights, is usually a good indication that alternator is about to fail its not the altinater its new
Alternator is failing.
have the alternator checked. sounds like it is not producing enough current to run when at idle. also have battery checked as a bad alternator can trash a battery
Have you checked the fuses?
If the lights flicker when the vehicle is running, the alternator is on it's way out.
usually this flickering affects the headlights to and is caused by a bad alternator
a weak battery would most likely be the problem. if that doesnt work, have your alternator checked.
Well when you are driving the alternator is at a constant speed then when you slow down the alternator sort of skips a beat causing the lights to dim!
You may see the headlights and dash lights flicker at an idle. You may hear unusual noises coming from the alternator when the engine is running.