If all looks OK, get out your wiring diagram and find out what color wires you need to test. Now what? First, give everything a visual inspection. So something is not working and we have a Wiring Diagram. The Auxiliary and Accessory Circuit Diagram, The Starting and Charging Circuit Diagram, The Lighting Circuit Diagram and The Complete System Circuit Diagram.Īuxiliary and Accessory Circuit Starting and Charging Circuit Below is the wiring for a Triumph Rocket III. Sometimes, the Motorcycle Manufacturers help us in this by separating out the wiring for major systems making it easier to decipher them when a problem occurs. Here are some wiring diagrams so you can see what I mean. I had to cut into the wiring bundle and separate each wire and test it till I finally found the fault. I found it hard to believe but it was true. I remember way back in 1972 working on an Austin-Healey Sprite sports car, which they tell me is the same as an MG Midget sports car, while I was in the army. Fortunately, things have gotten better over the years. Some have each wire with a color ID Initial like G for green or Br for brown and the like. Some have the wires drawn with the appropriate color. In fact, there can be several methods to the madness, so to speak.

While these Wiring Diagrams may seem confusing there is a method to their madness. To fix a fault in this mess of wiring we need to remember each system is separate. However, if we want all the fun stuff we put on our Motorcycles to work, we have to have what is essentially a combination of many different wiring systems. The complication can be almost unbelievable.

A Ground wire or Ground to a frame.įrom here the skies the limit. Such a Device can be a Light Bulb, CDI box, Instrument Cluster, Switch, something like that. Such as a Battery or power from Source Coils under a Flywheel. The Simplest Wiring System has just four parts. No Charging System, no Turn Signals, no Brake Lights, no nuthin'. Without a Wiring System there will be no light. 'And God said, Let there be light: and there was light.Īnd God divided the light from the darkness.'

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