Your cars lights may be dimming and lighting up again due to a faulty bulb.
It sounds like a faulty voltage regulator. I had a similar problem on a '78 Challenger (or was it Charger?) Horacio
to dim the lights in your car.
You should dim your lights as soon as you see their lights.
when you see there lights you should dim yours
As soon as the oncoming car is in sight.
There should be a roll switch right next to your light switch on your dash to dim the lights with.
How dim? There are several possible answers. First, the output of the light coil is directly related to the engine rpm. Second, if the regulator/rectifier is not functioning properly, the lights can be dim. Third, if you have a poor ground connection the lights will be dim.
Flat battery !
You probably have a bad ground on your "dim" light.
You should dim your headlights within 500 feet of the car in front of you. The rule of thumb is, if you can see another car, dim your lights.
I was driving down the road and my car lights went dim and my 1992 lumina started to lose power.
The lights on your vehicle may be going dim because the bulb is getting ready to blow out. Try changing your bold and see if that helps.