For those running the Arc Moto 600.4 with a stock head unit are you using the "auto sensing turn on" feature or did you end up hard wiring the amp turn on lead? Thanks for your help....

 

Use a wire in the fairing to do this. Auto sensing is flakey at best. You can use the accessory plug wire (cigarette lighter) or meter out and find a switched 12v wire to tap onto in the fairing.

 

I went right past the auto sensing to the hard wired option. I've never had much luck with the auto sensing switch except for home audio.