Hi! After nearly getting backed into last season I decided to mount a horn. Went overboard and got a Kimpex motorcycle multi switch for hi/lo, signal and horn.

Using a 4 terminal relay, everything works fine while the switch is dangling. As soon as I mount it on the bars it’ll spark when positive wire touches battery terminal and nothing else on the battery inc. neg terminal.

Tried putting electrical tape on the bar to try isolate it from grounding. Put tape on the inner plate of switch and same thing.

Had it mounted between the oem switches and left brake lever. It’s a tight squeeze but that’s the only place I can mount it. The only thing I can figure is that it’s grounding against the brake lever and/or oem switch block.

If I get time later today, I plan to disassemble the switch to see if I can find something amiss inside.