Turn signals and emergency flasher work fine but, while with a right turn the indicator light on the dash flashes normally, with a left turn it flashes once, weakly, and then ceases, although the turn signal lights themselves, front and back, flash on merrily. "I can live with that," I said to myself when, after cleaning all contacts, the situation didn't change. Then I installed a trailer hitch & its wiring and, lo and behold, when I tested the trailer's lights the indicator light functioned normally. Disconnect the trailer plug, and the previous condition returns. Any ideas what's going on?
Bob S.