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solismaris
Explorer
Jun 07, 2014

truck's flasher module keeps burning out; trailer's fault?

I'm now on my third flasher module in my GMC Sierra in less than 2 years. The last time, my mechanic checked all the related wiring and even replaced all the TV turn bulbs because it's just crazy to have 2 fail in 2 years. He also suggested the problem may be in my trailer.

So, I have a Prowler trailer. I inspected the wiring and fixtures and saw no evidence of shorts, etc. But I did notice one thing: this trailer has 3 lamps on the left and 3 on the right, so when the hazards are on that's 6 bulbs flashing, for a total of 11 amps, plus whatever the truck's flashers use. So could this just be too much power for the flasher unit, causing it to burn up?

Do most trailers use less than this many lamps for the turn/hazard indicators?

Maybe I should replace them with Led equivalents to cut way back on the amperage?

Because I'm going camping next weekend, as a temporary measure I removed one of the 3 bulbs on each side and will also try to avoid using the flashers (the left or right turn signals would only use half the power of the flashers I'm guessing).

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