Problem: LR turn signal flashes rapidly when headlights are off. LR turn signal flashes normally when headlights are on. Have checked all fuses,ok. Have replaced LR bulbs, new. Can't find any broken wires. Any ideas would sure be nice.
I would temporarily disconnect that 4 way trailer harness to see if it is the cause since it is wired in to the back end of the vehicle. Can't hurt unless it is wired in permanently.
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