I have just repaired my taillights and brakes by replacing the ground wire. Now all of a sudden I no longer have high or low headlights. However, when I pull back on the beam selector switch and hold it all the way back both beams come on. my parking and directional lights work. When I checked voltages on my headlight sockets, I did not get anything. Any ideas what may be causing this?

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.

run an auxiliary ground wire to verify, you might be surprised...

It is a ground problem. When you turn on your headlights, they are sharing the same ground that your brake and T/S lights are using. Check all ground connections to the body from all headlight and taillight wiring are connected and tight. If it doesn't affect your taillights, it may be in your T/S switch. Check your ground connections first.

If you are not getting power from the headlight switch for that circuit, but the other side works, you'll have to trace the wiring. The socket has two wires plus a ground. One wire is for the tail lamp circuit and the other is for brake-turn signal.

look for a ground wire that wasn't installed after the repair or a broken ground wire from the impact

I would check the ground wire for the parking light circuit, especially around and in the light socket where you replaced the bulb.

This may actually be a pretty easy fix, first of all if you haven't tried replacing the headlights yet, try that. Then if that doesn't work, have a mechanic take a look at the car, the wiring may be faulty and needs to be replaced. But if that doesn't work, which most likely should than the car might be bad. But I'm just jumping to conclusions here. Hope that helped :D

Good Luck!

check for voltage in the socket. positive is the center connection. if you have no voltage there, then you may be right. Make sure that you check the wires.

1. Check for power to the turn signal switch on the White and Yellow wires with the brake pedal depressed. If low voltage, check the stop light switch operation on the brake pedal. Check the Center High Mount stop light (CHMSL) circuit operation.

2. Check the black wires at the turn/brake sockets for a good ground.

3. If all OK, check for a bad frame ground to battery negative. 4. and dont forget to check the rear bulb

It's the dimmer switch in the column.