* Wiper Switch: The switch on the handlebar could be faulty. It's a common point of failure. Test continuity with a multimeter to see if it's sending power when activated.
* Wiring and Connectors: Check the wiring harness from the switch to the motor. Look for broken wires, corrosion in connectors, or loose connections. Pay close attention to areas that experience vibration or flexing.
* Wiper Linkage: The mechanical linkage connecting the motor to the wiper arms might be seized, broken, or disconnected. Manually try to move the wiper arms to see if there's resistance or if they're free to move. Look for any obvious signs of damage or wear in the linkage itself.
* Ground Connection: A poor ground connection can prevent the motor from functioning. Ensure the ground wire from the motor is securely attached to a clean, unpainted metal surface.
* Wiper Motor Relay (if applicable): Some systems use a relay to control the motor. Check if your Bonneville has one and if so, test it or replace it. A malfunctioning relay will appear as if the motor itself is dead, even if the motor is functional.
* Park Position Switch: Some wiper systems use a park position switch to determine the resting position of the wipers. If this is malfunctioning, it could prevent the wipers from operating.
* Intermittent Wiper Mechanism (if applicable): If your Bonneville has an intermittent wiper setting, the timer or associated circuitry could be the culprit. These are notoriously problematic in some vehicles.
Troubleshooting Steps:
1. Visual Inspection: Start with a thorough visual inspection of all the components mentioned above.
2. Continuity Testing: Use a multimeter to check for continuity in the wiring from the switch to the motor.
3. Voltage Testing: Check for voltage at the motor terminals when the switch is activated.
4. Manual Check: Try to manually move the wiper arms to assess the mechanical linkage.
If you're not comfortable working with electrical systems, it's best to take your Bonneville to a qualified mechanic or a Triumph specialist. They'll have the tools and expertise to diagnose and repair the problem efficiently.
