a flat battery
I think it is a dying battery
Probably your alternator.
I have an 2005 and the headlights on it will dim, and then brighten back to normal. I bought it brand new, and it has done it since I bought it. I actually took it back to the dealership, and asked them about it, and they said that Chevy knew that it would do that, but that the car would keep running, and that there was nothing that they could do about it. Hope this helps.
its to conserve power to start veh. with full voltage to starter headlights will come on after starting car
Your alternator may not be putting out enough Amps to charge your battery and run your headlights as well. You can test this by measuring the voltage from the battery with a multimeter. With the car running the volts should be around 14 or more on a 12 volt battery. Try it with the lights on too.
It has a bad seal or a crack allowing moisture to get in.
I had the switch assembly on the steering column get burned-up at it caused my headlights to go out. It cost about $250 to replace.
check your water...
Your battery is weak, or your your alternator is not charging battery.
Diagnostic Code 51 for a 1994 Plymouth Voyager is the vehicle running too rich or too lean on fuel. Diagnostic Code 35 has to do with the cooling fan for the engine. It is not coming on at the proper times due to a short or a bad fuse.
i have a 91 dynasty and my headlights dont work i have read on this site that it might be the headlight switch im not sure whats wrong with the dash.
Running water causes the martian valley
More than likely a blown fuse.
Loose battery or alterator connections
you might have a short in your alternator. In my car the headlights would dim when I put on the brakes or tried to use cigerette lighter to power up my phone.
Because the power for your headlights is pulled from your battery. When the dashboard lights dim after turning on the headlights the dashboard lights aren't getting as much power as they were with the headlights off. With the motor running or off? The headlights draw a lot of current, but should not visibly affect other systems. There could be a problem with a worn out battery, an alternator that isn't charging correctly, or you have a bad earth between the battery and the chassis. Check the large cable connection between the battery (usually negative these days) and the bodywork, or between the engine block and the bodywork.
usually the headlights have a fusible link near the battery but check for power to the highbeam switch and headlight switch first.
A faulty ECM!!!
replace your radiator cap...
The door being open.
lack of coolant, check for leaks.
A car battery causes the headlights to shine
Check the grounds for the headlights.