This is because wires sometimes have to go around other parts which makes you need a longer cable. To help with this we have a few tips for you to avoid any mistakes which will make the building process less frustrating.įirstly, it is advisable to always leave some extra length to your cables. You can draw your own wiring diagram however it is also very easy to find original motorcycle wiring diagrams with a click on the internet.Īfter you have got the wiring diagram covered it is time to do the actual wiring work. Examples of a self-made and original wiring diagram can be seen below. It also shows the relative position and arrangement of all components. The wiring diagram shows exactly how all components of the circuit are connected. If it's necessary to connect individual wires with each other you can also use soldering equipment.Īfter you have gathered all your materials for the electrical system, it is time to draw or find the wiring diagram suitable for your motorcycle. In order to create the electrical circuit, you need the following tools and equipment: electrical tape/fish tape, liquid tape (optional), wire stripper, plier, screwdrivers, heat shrinking material and a multimeter. The wiring harness is composed of all the cables that connect to the m-unit and all the electrical components. Measures the speed at which you are traveling. This is where you put your key in.Īctivates the brake lights when brakes are pressed.ĭepending on the engine's design, your bike can be equipped with sensors detecting the current crank position, air pressure and temperature in the intake, throttle position, oxygen content in the exhaust gas, etc. The horn is used to warn someone of danger.Īn ignition switch or starter switch is a switch in the control system of Harley and activates the main electrical systems for the vehicle. It also regulates the amount of current produced to prevent overcharging. The regulator/rectifier changes, the alternating current produced by the alternator into direct current so it can be stored in the battery. The alternator creates alternating currents to run the bike and charge the battery. The charging system consists of two main components: the alternator and the regulator/rectifier. This spark ignites the fuel-air mixture within the cylinder. The job of the ignition system is to set a spark at the right moment within the cylinder. These are for example the speedometer and the tachometer. The instrument panel or dashboard holds an array of dials, lights, and gauges built into it that monitor the performance of your Harley and let you see what systems are on or of. Handlebar switches are designed to give you with a convenient way of controlling all the electrical equipment of your Harley, including the starter, ignition, headlight modes, exterior and emergency lights, computer option selectors, brake pressure switch, turn signals, horn, and other accessories. This causes the starter solenoid to close a pair of heavy contacts, resulting in relaying a large electric current through the starter motor, which in turn sets the engine in motion. When the ignition switch is turned on, a small electric current is sent through the starter solenoid. When deciding on a battery it is important to look at the amps, volts and amp hour rating, A motorcycle usually needs a 12-volt battery.Ī starter solenoid is a switch that creates the contact point between the battery and the starter. The battery provides the electric power for your Harley. It hooks up to the battery and passes the power to your lights, horn and all your other electronic components. The M-unit is the center of the wiring system. To make it easy for you, we made an overview of the 14 main components you will need for this job: This is important, as it gives you an overview of what you are going to build. The first step of your adventure will be establishing all the components needed for building your electrical motorcycle system. However, if you take the time to go through the wiring process step by step, you will notice that it is not difficult at all! Most riders are not familiar with wiring their bikes, it looks difficult and complicated at first, especially when you must start from scratch. The electrical system of a motorcycle is usually underestimated, forgotten or avoided by motorcycle builders.
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