Headlights won't work. high beams will. is there a circuit breaker bad? where is it located? thanks, steve

The circuit breaker for the headlights is inside the headlight switch.
But if your low beams work and the high beams don't, the problem may be in the dimmer switch.

When you say all lights, do you mean the dash and tail lights also ?
The headlight switch has a circuit breaker for the headlights built into the switch. So there could be a heavy current draw on the high beam circuit, or the breaker in the switch could be getting weak.
But that should not affect the other lights, unless the headlight switch has too much resistance on all circuits it controls.

If the high beam lights work by pulling on the dimmer switch, you are bypassing the headlight switch.
There should be a circuit breaker inside the headlight switch which could be faulty.

do the high beams work when pulling the switch back? maybe the light switch is bad

CHECK HEADLIGHT FUSE OR CIRCUIT BREAKER IF ALL IS GOOD.YOU COULD HAVE FAULTY HEADLIGHT SWITCH OR FAULTY DIMMER SWITCH.

Check out your fuse associate with the low beam headlight, secondly there is a relay fuse under fuse rely box under the hoos. Locate this box, and locate the relay fuse associated to the low beam. You can rotate the relay with another relay of the same spec to see if the low beam lights are coming on. I would believe that it is a fuse that is blown, check your owners manaual on the location of the fuse box. Usually it's located in the driver side kick panel.

Have you tried High Beam and Low Beam? Your headlamps are powered by a self-resetting circuit breaker located in the Component Center which is located under the right side of the dash. (see picture) It is not likely that the circuit breaker has failed.(although possible)
If neither the high beams or low beams work, you probably have a bad Headlamp Switch or a bad Dimmer Switch. If one works and the other doesn't, I would check the bulbs first. If the bulbs are good, then you still may have a bad switch. Also check all your ground wires near the headlamps.

Yes, I suggest looking for the Headlight Relay and a Circuit Breaker. You should find the Relay in the Powerbox under the hood and the circuit breaker should be in the fuse panel.

What is happening is the contacts are overheating. Instead of blowing a fuse some models use a Circuit breaker which recycles when it cools down. You can get the same action out of a Relay that is going bad.

If this continues after you replace the parts you should test the voltage going to the headlights and check the bulb sockets for corrosion. The headlights are made so that the low beam and high beam are separate and they are not on at the same time. If both filaments were on at the same time it would overload the relays and the Circuit breaker.

You will see that the bulbs are rated with 2 numbers, like 45/65 for low and high beam. If one side shorts out it will pull an additional 65 watts. Instead of drawing 90 total on low and 130 on high for 2 headlights, it will pull 155 with 1 headlight shorted. Thats 25 watts more than the Relay or Circuit breaker is suppose to handle. After 45 minutes of this, you get the flashing.

Firstly check to see if when you are engaging high beam that you arenot knocking the headlight switch as well.

if any of the headlights work the breaker is good, very rare to have a bad breaker. do both high beams work? if so most likely the bulb.