Big Bike Parts makes a switch assembly that mounts on the top of
the clutch master cylinder.
If you route the darkblue/white stripe wire from the start/stop
switch to the BB switch assembly, and route the output of
one of the three switches to the headlight relay terminal 86
you can use the switch to turn off your headlight while doing
You can route one of the other switches to terminal 86 of the
lightbar relay and use it to turn your lightbar on and off.
Here is the recommended wiring for the two relays:
Terminal 30/51 on both relays: 12 gauge red wire coming from
battery positive thru in-line fuses.
Headlight fuse should be 7.5 amp,
lightbar fuse should be 7.5 amp for two 35 watt lamps or
10 amp for two 55 watt lamps.
Terminal 87 of headlight fuse to darkblue/white wire input to
the headlight high/low selector switch.
Terminal 87 of lightbar relay to lightbar lamps
Terminal 85 of both relays to ground.
You can use any solid green wire on the bike for ground,
or the battery negative terminal, or the unpainted chassis
of the bike.
Terminal 86 of headlight relay from switch that you selected as
headlight on/off switch
Terminal 86 of lightbar relay from switch that you selected as
lightbar on/off switch.
If you are required to automatically turn off the lightbar
when your high beam is activated instead of installing the
BB switch assembly in series with the darkblue/white stripe
wire that would normally connect the output of the
start/stop switch assembly to the left handlebar switch assembly,
connect the BB switch assembly in series to the white
wire output from the high/low selector switch.
This will allow you to conform to the NHTSA regualtions,
but you will only be able to switch your lowbeam off
for maintenance purposes, and you will require a third
relay if you want to have your high beam on a relay.
[SIGPIC][/SIGPIC]2003 VTX1800 C model Retro fenders