The Stovebolt Site Forums The Shop Area The Electrical Bay Short in lighting circuit

Listen carefully- - - - -you do not have a short, nor an open circuit. You have enough current draw to make the circuit breaker built into the light switch cycle on and off. The fact that it takes some time to begin cycling means there is not a "short" in the classic sense of the term. A short would make the breaker begin cycling immediately, as soon as the lights were turned on. An "open" would keep the lights from operating at all. Do the lights flash when they're on low beam? If not, you need to start investigating the current draw ONLY in the high beam circuit. Forget about looking for parasitic drains or other extraneous Bovine Scatology. It's simply distracting you from finding the true cause of the problem.
Jerry

I know that the headlight switch is new, BUT, the contacts on the built in breaker could be the culprit. I had the same issue, but with the original headlight switch. My lights operated flawlessly on low beams but when I changed to the high beams, after a 1/2 minute or so the lights would come on the go off. The high beams draw more power then the low beams. On my truck, which is twelve volts, the high beams draw 60 watts and the low draw 50 watts. That extra 10 watts caused the breaker to heat up and open. The contact points were burned. That troubleshooting drove me crazy until I finally gave up and replaced the switch. Issue solved.

I’m not saying that is your problem, but I am saying it’s a possibility. The repop overseas parts are not the quality that the old “Made in USA” were.