It is frustrating, dangerous and illegal to drive at night with dim or broken headlights. When both stop working simultaneously, you can be sure it is not a matter of broken or dead bulbs, but rather an electrical issue. A few simple diagnostic tests may help you discover where the electrical issue comes from in your Dodge vehicle and how to fix it.
Check the voltage regulator. This is located on the passenger side of the car, under the hood and close to the fender. Make sure the wires go neatly from the alternator to the battery. If the regulator looks old or the wires are corroded, you will need to purchase a new one at an auto shop. You can replace it yourself, hooking it up identically to the one you remove.
Inspect the battery cables. Make sure they are clean, tight and not corroded. If they are, you may have to tighten the cables or replace your battery.
Check the alternator belt under the hood; the belt looks like a wheel with a belt stretched around it. Make sure it is lined up on the alternator tightly and not loose or slipping. If your car makes a squealing noise when you drive, the belt may be loose.
Turn your car back on and try the headlights when all the cables are tightened. If they still don't work, switch to your high beams for a moment, then back to your low beams. If the low beams work now, you probably have a loose, corroded or missing cable that you cannot locate. Take your car to a repair shop so that a mechanic can locate and fix the cable.
