Total Motorcycle Community Forums

Wiring diagnosis blows, especially if you dont have the right model information/diagram fro the bike.

I still have this bug where the rear brakelight comes on when the key is turned to lock!! I know that there's a short in the lock somewhere, but no real idea which wires to cross to get rid of it. So even with a wiring diagram, get ready for working out at least tens of possible permutations.

joshhead wrote:May I ask what you did to fix the horn? My CB360 horn honks like a champ when connected directly to 12V, but not at all when connected. I've purchased an aftermarket horn and it doesn't honk either, so perhaps it is the switch?

The stock wiring is crappy on these bikes. By the time the voltage makes it through the wiring and the switch, there isn't much voltage left. I put a relay on mine. The original horn wiring is wired to the coil of the relay to work it. I ran heavier gauge wiring (fused) from the battery, through the switched part of the relay and to the horn. It improved it a lot. Later, I used this set up for an inexpensive set of air horns from JC Whitney. Mounted the air compressor behind the air filter (strapped the compressor to the frame with SS screw clamps) and mounted the trumpets (They are black plastic) under the Honda emblem on the front forks. Nice and loud.

I am thinking of doing this to my NH750. It's horn is pretty weak too.

that sounds like a good idea. My horn is pretty comical sounding. If I blew it sitting next to you while standing still at a red light, you might hear it... but probably not. I have horn envy.