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solismaris's avatar
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 h...
enblethen's avatar
enblethen
Nomad
Jun 08, 2014
You may want to build a relay setup. Run large power wire to main contact, contact output to trailer lights. Use the output from the module to operate the individual functions. Would take two relays, one for each turn signal/brake light function.

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