Brake light burns every bulb

[TEPUI]

During the last year, I've had to replace the bulb on one of my brake lights at least 5 times. One would assume there's a short-circuit somewhere but i really don't know how to diagnose it precisely. Is there an accurate way to diagnose this? I'd hate to take it to a shop where they do "trial & error", normally breaking something else that ends up being more expensive.

Is it possible that I'm using low quality bulbs? I would eventually like to switch to LEDs but I'd hate to keep burning them if the problem is actually a short-circuit.

has anyone experienced this before?

 

[semlin]

do you have a trailer wiring harness, especially an aftermarket one? a bad harness splice caused me to blow my brake light fuse a few times. trace the harness wires back and check for bad splices/loose wires/bad ground etc..
that and moisture in the light housing would be my first guesses.

 

[TEPUI]

do you have a trailer wiring harness, especially an aftermarket one? a bad harness splice caused me to blow my brake light fuse a few times. trace the harness wires back and check for bad splices/loose wires/bad ground etc..
that and moisture in the light housing would be my first guesses.

Good call, never though of it. I do have a trailer plug on the hitch receiver bar. Not sure if PO installed it or Toyota Chile did.

I'll look into it.