I’ve replaced the 30-amp main fuse on my bike multiple times, but it keeps blowing. I’ve tried everything I can think of and I’m desperate for a solution. Anyone else faced this issue?
Response
I would start by checking the stator as it might be faulty. My stator was faulty, and after replacing it, my fuse stopped blowing.
Solutions that worked for users
| Solution | Users Who Found Success | Personal Experience | Estimated Cost (USD) | Time Needed (Minutes) |
|---|---|---|---|---|
| Check the Stator | 2 | Checked the stator and it was faulty | $50-$200 | 30-60 |
| Check for a Short Circuit | 2 | Found a short circuit near the starter solenoid | $0 | 15-30 |
| Unplug the Rectifier | 1 | Unplugged the rectifier and the fuse stopped blowing | $0 | 10-20 |
| Check the Starter Relay | 1 | Checked the starter relay and found it was faulty | $20-$50 | 20-40 |
Symptoms
- Fuse blows as soon as you turn on the ignition
- Fuse blows when hitting the starter
- Fuse blows randomly while riding
Possible Causes
- Faulty stator
- Short circuit in the wiring
- Faulty rectifier or regulator
- Faulty starter relay
Solutions that Worked
1. Check the Stator
What I Did: Checked the stator for any signs of wear or damage.
Outcome: Found that the stator was faulty and needed replacement.
Personal Experience: After checking the stator, I found that it was indeed faulty. Replacing it solved the issue.
Estimated Cost: $50-$200
Time Needed: 30-60 minutes
Steps:
- Disconnect the battery to avoid any electrical shocks.
- Locate the stator on your motorcycle, usually found on the left side of the engine.
- Remove any covers or panels to access the stator.
- Use a multimeter to check for resistance and continuity.
- If the readings are off, replace the stator.
Expert Tip:
Always check the stator first if you’re experiencing electrical issues, as it’s a common culprit for blown fuses. Also, consider using a high-quality multimeter for accurate readings.
2. Check for a Short Circuit
What I Did: Inspected the wiring for any signs of a short circuit.
Outcome: Found a short circuit near the starter solenoid.
Personal Experience: After some inspection, I found a short circuit and fixed it.
Estimated Cost: $0
Time Needed: 15-30 minutes
Steps:
- Turn off the bike and remove the key from the ignition.
- Inspect the wiring near the starter solenoid and other electrical components.
- Use a multimeter to check for continuity.
- Repair or replace the damaged wire.
- Use electrical tape to insulate any exposed wires.
Expert Tip:
A short circuit can cause immediate fuse failure, so always check the wiring near the starter solenoid. Also, consider using a flashlight for better visibility.
3. Unplug the Rectifier
What I Did: Unplugged the rectifier.
Outcome: The fuse stopped blowing.
Personal Experience: After unplugging the rectifier, the issue was resolved.
Estimated Cost: $0
Time Needed: 10-20 minutes
Steps:
- Locate the rectifier on your bike, usually near the battery.
- Disconnect it by unplugging the connector.
- Replace the blown fuse.
- Turn on the bike to see if the fuse still blows.
Expert Tip:
If unplugging the rectifier solves the issue, it’s likely that the rectifier is faulty and needs replacement. Also, consider using dielectric grease on electrical connections to prevent corrosion.
4. Check the Starter Relay
What I Did: Checked the starter relay for any signs of damage.
Outcome: Found that the starter relay was faulty.
Personal Experience: After checking the starter relay, I found it was faulty and replaced it.
Estimated Cost: $20-$50
Time Needed: 20-40 minutes
Steps:
- Locate the starter relay, usually near the battery.
- Use a multimeter to check for continuity.
- If the relay is faulty, remove it.
- Install the new starter relay.
- Reconnect the battery and test.
Expert Tip:
A faulty starter relay can cause the main fuse to blow, especially if you’ve recently installed a power commander. Make sure to disconnect the battery before replacing the relay to avoid any electrical shocks.
Motorcycle Models Where This Worked
- 2003 CBR600RR
- 1999 Honda Shadow Ace Deluxe 750
- 2006 1300c