Reconnecting The OEM Headlight Switch

(and activating the bikes hazard lights while you're there)

Credit for the first two "mods" goes to Rich from the BMWSportTouring forum. Check out his web site:

http://www.barstow.cx

Reconnect original light switch:

I wanted to free up the Police light switch and read how Rich had reconnected the original Euro switch. Below are the photo's and text from Rich that he posted on the BMW SportTouring forum used with his kind permission... thanks Coach

"I'm going to assume a few things here:

1. You have a manual w/ the wiring diagram in it.
2. You have the whole nose off, so you can get to the socket where the euro-switch bundle connects to the wiring harness.
3. You have and know how to use a short-circuit detector. (the little light on a probe doohickey).

Overview:
The OEM wires come from the switch as as single bundle, and all the wires connect through the socket to the wiring harness.

On MY ex-CHP bike, the wires from the switch came as a single bundle, but then 3 wires were split off to a separate connector, which connected to an aux switch, and then finally back to the OEM connector.

What I did was cut off this secondary connector, and then reconnect the switch bundle back to the original socket. The colours in the Clymer manual I have are match what I found. I cut, then soldered back to match the wire colours, and to match the arrangement in the diagram.

So, white/yellow (from the OEM switch) connects to white/yellow (on the socket side) and green goes to green, etc.. Ignore the colours on the aux switch, they don't match the diagram, and aren't in the diagram (of course).

Keep in mind that two of the wires are connected on the switch side of the plug.

What I did (and I don't think you have to) is create some jumper wires, run them from a known hot, and probe the suspected connections on the wiring harness. That way I KNEW for sure what that particular wire was! (highs/lows/parking)

So, in the first picture, the purple highlight. There's a yellow wire going from the OEM to the AUX switch. Cut that, and reconnect the OEM switch side of it to the yellow wire coming out of the OEM plug side. "

Activating the hazard light function:

Also from Rich (thanks again coach) you can either buy the specific hazard light switch OR do what I did which was to reuse the now-redundant authority horn/siren switch as it uses the same plug as the hazard. Below are Rich's photo's of the socket and where it is located. The new switch just goes in place of the blank switch plate on the right hand side of the dash...simple.