Bill, I've copied pasted your below response because for some unknown reason I can this content in my iphone but not on my desktop computer, so forgive me for restating your below response.
"Turn the headlights to low beam.
Turn off the headlights and go drink a beer.
Turn on the headlights and time how long it takes for the thermal switch to interrupt the first time.
Turn the headlights to high beam.
Turn off the headlights and go drink another beer.
Turn on the headlights and time how long it takes for the thermal switch to interrupt the first time.
The high beam pulls a little more current than the low beam, so the thermal should trip a little quicker. Actually, neither should trip, but I'm just checking to see if one trips and the other doesn't. If they both do I'd replace the switch, which should also fix your taillight problem."
Bill, I did something similar as you suggested but I was not as thorough as you. I plan also to disable the dimmer and jumper power from the light switch and feed 12 volts directly to fuse port for the upper and lower sealed beam. In my mind if the issue is with the dimmer the thermal switch should not open the circuit and thus light stay on. I'll do this on the independently to the upper and lower.
Thanks also to 52Carl.
