Headlights not working on low beam

More than likely there is a bad ground. The same ground wire that is used for the headlights is spliced into and used for the parking lights, brake lights and directional lights. The circuits for the brake lights, the brake light switch, the directions and directional switch are related. The circuits for the parking lights, headlights, headlight switch and high/low beam switch are related as well, but the only thing all these circuits have in common is their ground source. Any questions feel free to write back. Good Luck.

It could be driving lights mode instead of low beam. Check connections.

Check the fuses first. then replace the turn signal switch if all fuses are good. All the lights run threw it, except the high brake light on the rear.

You must be loosing a ground when turning high beams on, have you tried using a test light and check right at the bulb connector and see if your loosing ground or power?

The headlight switch gets power for the headlights from a 50amp fuse.
The fuse powers the headlight switch then the dimmer switch breaks for high and low beams. So if the high beams work, the problem may be with the dimmer switch.
The dimmer switch is made into the turn signal switch on the column. You would need to check the low and high beam circuits at the switch for power.

WAY TO GO !!! another "great idea" from vehicle manufactures

change the switch

Go back and check the fuses with a meter or test light. The test light can be purchased at a autoparts store cheap. Use the owners manual or see if the fuse location is marked on the fuse box cover.

just replace the dimmer switch under the column its wore out on the low beam side

Might want to check the fuses if you haven't already.