1974 charger headlight problem

my son took out his charger for its first run, after about 10 min . the headlights turn off? all other lights stay on and are working normal. if you turn them off for a few minutes and turn them back on they work for a few min. then shut off again. I did a search for headlight relay but all that comes up is the headlight switch which is new (from autozone).is the relay in the switch or somewhere else? Thanks for any help.

There are NO fuses or relays on headlight circuits, bad connection and/or bad switch.

Yup and I would also consider a headlight relay kit to take the load off.

http://www.ebay.com/itm/Dapper-Lighting-...f78&vxp=mtr

Classic symptoms of a bad HL switch (even tho its new) Murphys Law. Unfortunately no return (usually) with electrical parts. I'd purchase another one & likely you will be fine.

Check the headlamp harness ground wire. It bonds to ground close to negative battery terminal, and on the battery side of the radiator support. I have seen these cause lots of headaches, and often get broken due to multiple battery replacements over the years. Good luck!

The headlights have a self resetting circuit breaker. That is what's causing the lights to go off, then after a while work.

Now the question is what is tripping the breaker.

I'd check for loose and dirty connections.

the dimmer switch also can cause this symptom.check the connections for proper contact/corrosion.

I agree check the dimmer.My Dart did the same thing.The dimmer was bad.Rocky

I bought a new american made headlight switch and a new dimmer switch. not sure which one it was but lights are working great now. Thanks for all of the help

Glad to hear you got it. I would see the headlite switch cause that problem most of the time as some times the contacts in the circuit breaker in the switch get corroded and it cause some heat in the switch which can trip the breaker in the switch. Ron