Turn signal and backup lights
My backup lights come on and blink when I turn on my left turn signal. will not do it with my right one
Sounds like a short in the wiring inside the steering column. HTH. -Jim
Do you have a trailer plug for towing a trailer? If so check for a crossconnection back there. If not check for one in the left turn signal light assembly wiring and make sure the ground is clean and tight.
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