Why does my main fuse on my motorcycle keep blowing?
A motorcycle fuse blows when the current draw on a circuit exceeds the amperage rating of the fuse. In other words, if a light or a starter or some piece of equipment gets a short circuit then there’s a rush of current down that particular wire (or wires).
What causes the fuse to fail when I turn the key to the start?
If the WHITE wire coming off terminal “S” is shorted anywhere between the ignition switch and the clutch/brake switch and the attachment clutch and solenoid it will cause the fuse to open/fail or if “clutch/brake switch or “attachment switch is shorted it will cause the fuse to fail/open whenever the key is turned to the start position.
Why does the fuse keep blowing on my ignition switch?
When the circuit is live and the short is present, the bulb will be full brightness and hot so be sure it is not laying on the carpet or against a plastic door panel. Now you can unplug electrical connectors and move things around to see what makes the short go away. When it does, the bulb will get dim or go out.
Why does my lawn mower keep blowing the fuse?
So every time I turned the key to start mower it blew the fuse. I got a switch with same prong letters in same place on them an problem solved. First make sure the battery is fully charged.
What happens when the key is turned to the start?
When the key is turned to the start position, contacts B, S and L all become hot with 12 volts DC. I added the wiring diagram in the image below which should also be in your Owner’s manual so that can follow the circuits.
If the WHITE wire coming off terminal “S” is shorted anywhere between the ignition switch and the clutch/brake switch and the attachment clutch and solenoid it will cause the fuse to open/fail or if “clutch/brake switch or “attachment switch is shorted it will cause the fuse to fail/open whenever the key is turned to the start position.
When the circuit is live and the short is present, the bulb will be full brightness and hot so be sure it is not laying on the carpet or against a plastic door panel. Now you can unplug electrical connectors and move things around to see what makes the short go away. When it does, the bulb will get dim or go out.
So every time I turned the key to start mower it blew the fuse. I got a switch with same prong letters in same place on them an problem solved. First make sure the battery is fully charged.
When the key is turned to the start position, contacts B, S and L all become hot with 12 volts DC. I added the wiring diagram in the image below which should also be in your Owner’s manual so that can follow the circuits.