With headlamps off the Right Turn signal works correctly. The left turn signal also flashes the parking and tail lamps on the Right side. The 4-way flashers work but also flash the tail lamps. Not sure if the tail lamps should flash.

With headlamps on the left turn green arrow and the left turn lamps are on continuously with the turn signal switch in the center off position. There is no change when the turn signal switch is moved to left turn position. When signal switch is moved to right turn position the Right turn lamps flash correctly but the Left are still on not flashing. The 4-way flashers turn on but do not flash. All lamps have normal brightness and voltage at the battery with engine idling is 13.5 volts.

Any ideas whether this is a switch, ground problem or?

Tom