Project Shelby: A persistent brake light problem

We keep blowing up our turn signal switch on the 1967 Shelby GT350 project. This problem is driving us bonkers.

http://classicmotorsports.net/project-cars/1967-Shelby-gt-350/mysterious-taillight-problem/

If it were me, I'd look into letting a relay or two carry the load, rather than the switch.

I agree with VClassics that some sort of relay or other type of electronic switch is probably a good idea.

However I'd also check basically every connection between the switch and the actual lights for corrosion or otherwise increased resistance. Given that W = V x A, if you don't get enough V the current draw would increase...

I assume that you have checked that the correct bulbs are fitted? Does the Shelby by any chance use lower wattage bulbs?

Sounds like a pinched wire somewhere

This must be refering to the column switch. I would take apart a switch or two. I bet the OEM is a better made unit with more robust contacts which I assume are failing under the load. LEDs or a relay should solve your problems. I would also not rule out a problem with the flasher relay or partial grounding in a front turn signal lamp housing.

Cheers Ron

We couldn't find any wiring problems and the car does not have a tilt wheel. So far, the LED bulbs have solved the problem.

Thanks for the help.