The 1990 Kawasaki GL1500 is a classic touring motorcycle known for its comfort and power. However, like any machine, its cruise control system can malfunction. This guide dives deep into understanding the cruise control system on a 1990 GL1500, addressing common issues and offering troubleshooting advice.
How Does the Cruise Control System Work on a 1990 Kawasaki GL1500?
The cruise control on your 1990 Kawasaki GL1500 is a sophisticated system that maintains a constant speed. It works by engaging a mechanism that partially closes the throttle, preventing the motorcycle from accelerating or decelerating. This system typically involves:
- Speed Sensor: This sensor monitors your motorcycle's current speed.
- Control Unit: The control unit receives the speed information and commands from the switchgear.
- Actuator: This is the component that actually engages and disengages the throttle, maintaining the set speed.
- Switchgear: The buttons and levers on the handlebar that you use to engage, set, and disengage cruise control.
A malfunction in any of these components can lead to cruise control failure.
Why Isn't My 1990 Kawasaki GL1500 Cruise Control Working?
Several reasons can cause your cruise control to malfunction. Let's explore some common culprits:
1. Low Vacuum:
- Explanation: The cruise control system often relies on engine vacuum to operate the actuator. If there's a vacuum leak in the system, it won't function properly.
- Troubleshooting: Check all vacuum lines for cracks, leaks, or loose connections. A faulty vacuum diaphragm in the actuator could also be the problem.
2. Faulty Speed Sensor:
- Explanation: If the speed sensor is malfunctioning, the cruise control won't receive accurate speed information, preventing it from working correctly.
- Troubleshooting: This usually requires a multimeter to test the sensor's output voltage. A faulty sensor often needs replacing.
3. Problems with the Cruise Control Actuator:
- Explanation: The actuator is the mechanical heart of the system. Wear and tear, seizing, or internal failure can stop it from responding to commands.
- Troubleshooting: This component often requires careful inspection and possibly replacement. Listen for unusual noises or binding while operating the system.
4. Wiring Issues:
- Explanation: Broken wires, corroded connectors, or shorts in the wiring harness can interrupt the electrical signals needed for the cruise control to operate.
- Troubleshooting: Carefully inspect all wiring related to the cruise control, looking for damage or corrosion. A wiring diagram for your specific motorcycle model will be invaluable here.
5. Faulty Control Unit:
- Explanation: While less common, the control unit itself can fail. This is a more complex issue that typically requires professional diagnosis.
- Troubleshooting: This usually requires specialized testing equipment and might involve replacing the entire unit.
Where Can I Find Parts for My 1990 Kawasaki GL1500 Cruise Control?
Parts for older motorcycles can sometimes be challenging to find. Your best bet is to check with reputable motorcycle parts suppliers, both online and brick-and-mortar. Kawasaki dealerships may also have access to parts or can guide you toward reliable sources. Online forums dedicated to Kawasaki GL1500 owners are another excellent resource for finding parts and advice.
Can I Repair My 1990 Kawasaki GL1500 Cruise Control Myself?
While some minor repairs, like checking vacuum lines, are manageable for experienced DIY mechanics, more complex repairs like replacing the actuator or control unit might require professional help. Attempting repairs without the necessary knowledge or tools could potentially cause further damage. Consult your owner's manual and weigh your skills carefully before attempting any repairs.
This information is for guidance only. Always refer to your 1990 Kawasaki GL1500 owner's manual for specific instructions and safety precautions. If you're unsure about any repair, it's best to consult a qualified motorcycle mechanic.
