Check for a loose ground wire. I had a similar problem with our Challenger, running LEDs wouldn't come on, intermittent turn signals out, high beam indicator would come on while driving, no side cameras with turn signals (intermittent)
Turned out to be a loose ground wire for the harness. Ours is under the hood, driver's side, and attached to one of the brackets holding the fiberglass front end on. Bolt was stripped out, changed to a larger bolt, no problems since..
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