agchevelle
New member
Hello All, New member here. Forgive me if this is already somewhere, though i feel my issue is specific to me. So i inherited my bike from my uncle. We have worked on this bike together since i was a teenager. He altered the bike frame back in the 80's to turn it into a chopper. No i have it and i have made it into a bobber. The electric system was updated back in 2000 to update the voltage regulator and alternator. I have installed the new M-Unit blue and m-buttons for my setup. I am wiring everything from scratch. No wiring harness etc. The issue i am having is that i cannot get the bike to crank over. I saw there was some issue with wiring up a charging indicator light from the starter relay. I never had that on the previous build and the bike worked great. I saw on a site someone offering a charging light elimination kit. it looks like a resistor to an indicator light. I hope i have my wires to the starter relay correctly. I currently have 5 wires coming out of the relay. One to the ground, on is + to the battery, one red from starter solenoid, and the 2 others go to the diode board. I am so lost and just dont know/ am familiar with this type of charging/ignition system. The problem is that Airhead BMWs are unique own their own, then you add in the new M-Unit stuff and then to get even more confused its unique to what my Uncle has done over the years. So if anyone has installed the new M-Unit blue on an airhead please let me know what you did. I will upload pictures later. All of my wiring is in a separate box as I have eliminated the old air box and all of my electrics are house there with the ignition and 2 ignition coils. Trying to avoid updating anything else for now as my wallet is starting to dry up.
