by kiko » Fri Jan 19, 2018 6:55 am
I am no mechanic, but here is what I did and it works for me:
I zip tied an automotive 4 pin relay on the frame under the gas tank near the coil. The relay has 4 marked pins 30, 85, 86, and 87.
Run a new dedicated 12v wire from the battery positive terminal to connection tab #30 on the 4 pin relay.
Run a new wire from #85 relay tab to bike frame, an existing ground wire, or the battery negative terminal.
Relay tab #86 is the trigger that actuates the relay to send power to the light bar. Find the wire that is hot when you turn the ignition key to the on position. Mine was located in a boot in the wiring harness under the gas tank. Tap into this connector and run a new wire to #86 tab on the relay. (Just follow the ignition switch harness down to this boot and test each wire to find the hot wire with the key on.)
Tab #87 on the relay is the power out to the LED bar. Run a new dedicated wire from tab #87 to the LED positive lead. Add an inline fuse on this wire to protect your LED light.
Run a new ground wire from the LED negative lead to frame, battery negative terminal or another existing ground wire somewhere.
Now : When you turn on the key, the light will come on. The LED bar will always come either on or off thru the ignition key.
If you want an independent on/off switch for the LED light bar then add a two pole on/off toggle switch to your handlebars. Splice into the power wire to the LED light bar (that is the wire connection tab #87 on the relay). One side of the switch in the incoming power from tab #87 and the remaining pole of the switch is the power to the LED positive lead. So now you can interrupt the power to the LED light bar if the motor is running and you do not want the lights on.
Clear as mud right? Anyway tons of youtube videos and images on the web that shows the installation.
I have an 18w LED headlight and a 10w LED tailight. No problems.
Last edited by
kiko on Sat Jan 20, 2018 6:42 am, edited 1 time in total.