The park signal should only come off of the headlight switch, and not run into the turn switch. Are you using single or 2 wire front lights? Single like the OEM rear brakes will tie into the specific turn switch wires and only come on with turns. No front park like the stock look. 2 wire front will have the low side on park lead and high to turn. No ground is needed in the switch being the ground reference comes from each bulb. The switch completes the circuit from batt thru flasher and to the bulbs. Is it a 2 or 3 post flasher? A 3 post flasher has one wire to hot of turn switch for external bulbs, and the other to the bulb inside the switch. A ground source in the switch is used to light up the bulb inside the turn switch if it has one.Sounds like something is kitty wampus with the switch. And there is specific left/right fronts and left/right rears.
Last edited by Chip O; 12/21/2024 10:40 PM. Reason: Add a word