One of the crucial components of a motorcycle is its starter relay. It enables the engine to start by connecting the battery to the starter motor. In this article, we will provide a detailed guide on the shovelhead starter relay wiring diagram. We will also address frequently asked questions about this topic.
What is a Shovelhead Starter Relay?
A Shovelhead is the nickname for Harley-Davidson’s Evolution engine. It was actively used in motorcycles from 1984-1999. A starter relay is an electromechanical device that controls the power to the starter motor. Its primary function is to connect the battery to the starter motor, allowing the engine to start.
The Shovelhead starter relay is usually located on the left side of the motorcycle frame. It is connected to the battery and the starter motor with wires. There are usually four wires connected to the starter relay – two from the battery and two from the starter motor.
Shovelhead Starter Relay Wiring Diagram
The Shovelhead starter relay wiring diagram is relatively simple. It consists of four main components – the battery, starter motor, starter relay, and ignition switch. Below is a step-by-step guide on how to assemble these components:
Step 1: Battery Connection
The first step is to connect the positive (+) cable of the battery to one of the starter relay’s large terminals. The other large terminal should be connected to the starter motor’s positive (+) cable.
Step 2: Starter Motor Connection
The negative (-) cable of the starter motor should be connected to the motorcycle’s frame. The frame acts as a ground for the starter motor.
Step 3: Ignition Switch Connection
The ignition switch should be connected to the starter relay’s small terminal. This wire is usually marked with an “S” on the starter relay.
Step 4: Battery to Frame Connection
The negative (-) cable of the battery should be connected to the motorcycle’s frame. This wire acts as a ground for the entire electrical system.
FAQs
Q: Why is my Shovelhead not starting?
A: There can be several reasons why a Shovelhead motorcycle is not starting. One of the most common reasons is a faulty starter relay. Check the wiring connections between the relay, battery, and starter motor. A dead battery can also cause starting issues, as can a faulty ignition switch.
Q: What type of wire should I use for my starter relay?
A: It is recommended to use a 12-gauge wire for the battery and starter motor connections. The wire used for the ignition switch can be smaller, around 16-gauge. Make sure to use wire connectors that are appropriate for the wire gauge.
Q: Can I use a universal starter relay for my Shovelhead?
A: Yes, a universal starter relay can be used for a Shovelhead motorcycle. Make sure to choose a relay that is suitable for your motorcycle’s voltage and amperage requirements. Consult with a mechanic or refer to your motorcycle’s owner’s manual for more information.
Q: Can I install a new starter relay myself?
A: If you have experience with motorcycle electrical systems, you can install a new starter relay yourself. However, if you are not comfortable with electrical work, it is recommended to seek the help of a professional mechanic to avoid any damage to your motorcycle.
Conclusion
The Shovelhead starter relay is an essential component of a motorcycle. Wiring it correctly is crucial to ensure your motorcycle starts reliably. Follow the above Shovelhead starter relay wiring diagram to ensure proper wiring connections. If you experience any issues, refer to the frequently asked questions or seek the help of a professional mechanic.
