Look behind your truck. Is there a trailer attached? (just kidding)

Sometimes the filaments on dual filament bulbs can break and cross each other. This can cause the flasher to blink rapidly. Rare - but I have seen it.

Last edited by Gord&Fran; 03/13/2021 8:00 PM.

Gord 🇨🇦
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1954 1/2 ton 235 4 speed