Question about kawasaki Ninja 250R Motorcycles

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My bike shorts out randomly and blows the main 30 A fuse between the battery and the fuse box. I believe there may be a bare wire shorting to the frame somewhere, and possibly a wrong fuse in the fuse box. All the fuses inside the fuse box are 10 A except one that is 30 A. I'm not sure the 30 A one belongs in there, which may be linked to why the main fuse is breaking.

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Electricial problems are the worse kind. If you believe there is a bare wire touching the frame you may be right, but in my experience most electricial problems can be traced back to a bad ground.
Follow your grounds and see if one is corroded or loose. also look at the wiring harness for places of possible touching to the frame or something else a wire could be grounding out. I like to explain it as chasing your tail much like a dog until you catch it. Electricial problems are no fun and extremely hard to diagnos online. I hope you find it fast and I hope my advice was helpful.

Posted on Nov 03, 2010

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My main fuse on 900 vulcan 2011 keeps blowing just when I try to put it in. Does anybody have any ideas? this bike has very ow miles and is kept in guarage.


Low battery will not blow a fuse. If it blows right away when you turn on the ignition you have a main electrical short. Disconnect the regulator to the battery connector at the regulator to see if you have a shorted regulator. After the main fuse blows you should not have a battery drain so figure out also why your battery is discharged. Is your batttery no good. This would not blow a fuse in any case. Was the battery out recently, or disconnected. Make sure it is installed correctly and none of the wires are connected incorrectly. THEN you will have to start tracing the wiring from the main fuse to find the short circut.

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1 Answer

2001 Honda Deauville NTV 650 keeps blowing the main 30 amp fuse


Hi, Scott before diagnosing your blown fuse issue, check the bottom of your seat, if its metal and comes in close proximity to the positive battery post you need to take the necessary steps to ensure there is no contact (electrical tape, thick rubber insulation, hammer a dent in the seat bottom etc.) You are going to need a wiring diagram from your service manual, a test light, an ohmmeter and plenty of extra fuses.
If you turn on your ignition switch and immediately blow a fuse you have a hard/dead short and is usually easy to find. With a test light connected to the hot side of the blown fuse holder start stabbing the wire/s that leads away from the fuse holder and towards the ignition switch, you test light will illuminate validating the short. When the test light fails to illuminate you have passed the short and need to back up until the test light illuminates, then look in the immediate area for the short.
If you driving down the road for 30 minutes or 15 miles and blow a fuse you have soft/flying short and may take some time and patience to find.
If the main fuse/circuit breaker constantly blows/trips while riding you probably have a faulty battery terminal connection. Check battery terminals for damage or corrosion, check battery cables at "BOTH" ends for loose, corroded, or broken connectors, "INSIDE" and outside the cable harness, perform connector wiggle test and check cables with an ohmmeter if necessary. Any other fuses that constantly keep blowing while riding are usually caused by a loose or corroded ground wire in the circuit, which means you have to check, inspect, test each and everyone with an ohm meter set on a low ohm scale 100 ohms or less . Simply touch one lead to the ground source and the other lead to the battery negative terminal, a reading of zero indicates a clean solid ground. Any number reading or infinity indicates a poor ground and needs to be repaired. Poor or weak grounds require excessive additional amperage to complete the circuit which in turn blows the small amperage fuse.
For more information about your issue and valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
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Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/gregg_c0ec1df182c7330e

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1 Answer

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Hi Anonymous, you have a hard/dead short that should be easy to find generally they are the easiest. Time to get out your test light and start tracking the wire from the power side of the switch, circuit breaker or the blown fuse receiver, when the test light quits lighting you are very close to your short. For a free wiring diagram please visit the website below and good luck.
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1 Answer

1997 Harley Ultra Classic blows 10 amp radio power fuse and 30 amp main bike breaker


Hi Anonymous, sounds like you have a hard short between the battery, ignition switch and the radio. For a free wiring diagram please visit the website below:
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Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/gregg_c0ec1df182c7330e

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1 Answer

Can a bad voltage regulator cause the main 30 amp fuse to blow?


Usually a bad regulator will only cause problems with charging...
Sounds like you've got a short somewhere in the wiring...I'd start by checking the ignition switch wiring and the connections going into the fuse box.

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1 Answer

1998 Honda VTR 1000 F Firestorm the main fuse keeps blowing


Hi, Brannonpanam before diagnosing your blown fuse issue, check the bottom of your seat, if its metal and comes in close proximity to the positive battery post you need to take the necessary steps to ensure there is no contact (electrical tape, thick rubber insulation, hammer a dent in the seat bottom etc.) You are going to need a wiring diagram from your service manual, a test light, an ohmmeter and plenty of extra fuses.
If you turn on your ignition switch and immediately blow a fuse you have a hard/dead short and is usually easy to find. With a test light connected to the hot side of the blown fuse holder start stabbing the wire/s that leads away from the fuse holder and towards the ignition switch, you test light will illuminate validating the short. When the test light fails to illuminate you have passed the short and need to back up until the test light illuminates, then look in the immediate area for the short.
If you driving down the road for 30 minutes or 15 miles and blow a fuse you have soft/flying short and may take some time and patience to find.
If the main fuse/circuit breaker constantly blows/trips while riding you probably have a faulty battery terminal connection. Check battery terminals for damage or corrosion, check battery cables at "BOTH" ends for loose, corroded, or broken connectors, "INSIDE" and outside the cable harness, perform connector wiggle test and check cables with an ohmmeter if necessary. Any other fuses that constantly keep blowing while riding are usually caused by a loose or corroded ground wire in the circuit, which means you have to check, inspect, test each and everyone with an ohm meter set on a low ohm scale 100 ohms or less . Simply touch one lead to the ground source and the other lead to the battery negative terminal, a reading of zero indicates a clean solid ground. Any number reading or infinity indicates a poor ground and needs to be repaired. Poor or weak grounds require excessive additional amperage to complete the circuit which in turn blows the small amperage fuse.
For more information about your issue and valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
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1 Answer

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Hi, Anonymous before diagnosing your blown fuse issue, check the bottom of your seat, if it's metal and comes in close proximity to the positive battery post you need to take the necessary steps to ensure there is no contact (electrical tape, thick rubber insulation, hammer a dent in the seat bottom etc.) You are going to need a wiring diagram from your service manual, a test light, an ohmmeter and plenty of extra fuses.
If you turn on your ignition switch and immediately blow a fuse you have a hard/dead short and is usually easy to find. With a test light connected to the hot side of the blown fuse holder start stabbing the wire/s that leads away from the fuse holder and towards the ignition switch, you test light will illuminate validating the short. When the test light fails to illuminate you have passed the short and need to back up until the test light illuminates, then look in the immediate area for the short.
If you driving down the road for 30 minutes or 15 miles and blow a fuse you have soft/flying short and may take some time and patience to find.
If the main fuse/circuit breaker constantly blows/trips while riding you probably have a faulty battery terminal connection. Check battery terminals for damage or corrosion, check battery cables at "BOTH" ends for loose, corroded, or broken connectors, "INSIDE" and outside the cable harness, perform connector wiggle test and check cables with an ohmmeter if necessary. Any other fuses that constantly keep blowing while riding are usually caused by a loose or corroded ground wire in the circuit, which means you have to check, inspect, test each and everyone with an ohm meter set on a low ohm scale 100 ohms or less . Simply touch one lead to the ground source and the other lead to the battery negative terminal, a reading of zero indicates a clean solid ground. Any number reading or infinity indicates a poor ground and needs to be repaired. Poor or weak grounds require excessive additional amperage to complete the circuit which in turn blows the small amperage fuse.
For more information about your issue and valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
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1 Answer

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Hi, Mooncat1970 before diagnosing your blown fuse issue, check the bottom of your seat, if its metal and comes in close proximity to the positive battery post you need to take the necessary steps to ensure there is no contact (electrical tape, thick rubber insulation, hammer a dent in the seat bottom etc.) You are going to need a wiring diagram from your service manual, a test light, an ohmmeter and plenty of extra fuses.
If you turn on your ignition switch and immediately blow a fuse you have a hard/dead short and is usually easy to find. With a test light connected to the hot side of the blown fuse holder start stabbing the wire/s that leads away from the fuse holder and towards the ignition switch, you test light will illuminate validating the short. When the test light fails to illuminate you have passed the short and need to back up until the test light illuminates, then look in the immediate area for the short.
If you driving down the road for 30 minutes or 15 miles and blow a fuse you have soft/flying short and may take some time and patience to find.
If the main fuse/circuit breaker constantly blows/trips while riding you probably have a faulty battery terminal connection. Check battery terminals for damage or corrosion, check battery cables at "BOTH" ends for loose, corroded, or broken connectors, "INSIDE" and outside the cable harness, perform connector wiggle test and check cables with an ohmmeter if necessary. Any other fuses that constantly keep blowing while riding are usually caused by a loose or corroded ground wire in the circuit, which means you have to check, inspect, test each and everyone with an ohm meter set on a low ohm scale 100 ohms or less . Simply touch one lead to the ground source and the other lead to the battery negative terminal, a reading of zero indicates a clean solid ground. Any number reading or infinity indicates a poor ground and needs to be repaired. Poor or weak grounds require excessive additional amperage to complete the circuit which in turn blows the small amperage fuse.
For more information about your issue and valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
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1 Answer

Electrical wireing harnes pinched or short circut blown out 30 amp fuse way out there for this problem big time safety issue kills power to bike


Yes, I've seen complete meltdowns of the entire wiring harnesses before. You're lucky you just blew a fuse. Now you've been given a warning that something is wrong and that you need to locate the problem. I've seen some older bikes that didn't have a fuse or circuit breaker in the wiring harness actually catch on fire because of a short.

Now, depending on what make and model of your bike is, determnes where you need to look. I work mostly on Harley's as that's what I've been working with since 1966. I find Harley's simplier to work on as they don't change as often as the Japanese bikes do. If your bike has a fuse box and it's not blowing any fuses other than the main fuse, the problem is most likely between the battery and that main fuse box. You really need to find a schematic of the wiring on your bike. Good Luck!

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1 Answer

Main 30 amp fuse blowing


Sounds like it is a short. Start checking all your main wiring and make sure that nothing has rubbed showing bear wire and that nothing is grounded on your system. The short in the loom if VERY common due to vibrations

Feb 19, 2009 | 1998 Suzuki GSX-R 600

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