Faulty wiring.
flicker
A flicker, a beam, a ray.
only a light flicker or two.
Because there is a light inside of the warmer, and you see the reflection from the light.
The answer is flick or flicker! XD LOL
Improper resistors.
Flicker.
Possible alternator problem
Sounds like the regulator in the alternator is going out.
the oil sender unit need to be replace.
wielding? or fireflys?<---i think they flicker don't know about that one