Where is the ACC wire on a motorcycle?
2 Answers
Motorcycle ACC wire is located in the central control system. Introduction to ACC: Adaptive Cruise Control is an intelligent automatic control system developed based on existing cruise control technology. Principle of ACC: During vehicle operation, the distance sensor (radar) installed at the front of the vehicle continuously scans the road ahead, while wheel speed sensors collect speed signals. When the distance to the preceding vehicle becomes too small, the ACC control unit can coordinate with the anti-lock braking system and engine control system to apply appropriate wheel braking and reduce engine output power, ensuring the vehicle maintains a safe distance from the vehicle ahead.
When it comes to the motorcycle ACC wire, it is the line in the circuit that powers accessory devices, such as cigarette lighters or USB charging ports. It is usually found on the ignition switch connector, which has multiple positions, and this wire only becomes live when the switch is turned to the ACC position. The location is not fixed and may vary across different models: for street bikes or sports bikes, the ACC wire is often near the handlebar switches, while for Harley or cruiser bikes, it might be hidden under the dashboard or inside the seat compartment. To locate it yourself, disconnect the battery to prevent short circuits, set a multimeter to the voltage setting, turn the key to the ACC position, and test which wire on the connector has power—commonly marked red or black. Safety first—wear insulated gloves when working. If unsure about the model, consult the repair manual for the most accurate information, as many online forums provide diagrams. When modifying, it’s advisable to add a fuse for protection to avoid damaging the circuit and affecting riding safety.
