Broken turn signal switch. Ordered new one, had it replaced for $80 labor. Horn honks all the time.Returned to mechanic. He advised the wiring harness was faulty. Disconnected horn relay. Does horn on steering wheel work by grounding? Is there a hot wire (blue/white) that completes the circuit? Could the mechanic have mis-wired when he did the work? Don't really want to go back to him again.

 

that wire should be blue with yellow stripe and yes it is grounded when the button is pushed completing the circuit