If it's the one I'm thinking of, it's the return wire from all the the dash lights. All dash lights have +12v on one side and this wire on the other which goes to the dimmer switch to control the amount of ground applied (to control intensity)...
Thanks man 😀 I am going to take the dash out today anyway and I will trace the wire ,but I was hopping that someone will know where exactly is going this wire .
Does anyone know where the black and yellow wire from the dimmer switch goes after this wiring harness plug? What does it power? I am in process of figuring out why my dash lights are not working and I found out that once I disconnected this plug...