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ignition fusekeeps blowing ???


Guest stozdaug666
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hello my Honda vtr 250 has been in storage for three months and when I got back I jump started the battery to get it running it ran then after about 5 km the ignition fuse blew. Replaced the fuse then after about 2km it blew again after the bike started up and now it blows instantly as you turn the key without starting the bike. I have replaced the battery and checked wiring for earthing points but cannot find any. Is the starter relay broken or do I need to look elsewhere for the problem ?

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thanks guys for the help, i checked the volts on the relay and i checked the volts from the ignition fuse port. both read 12V. i checked the relay and reconnected it but now the ignition fuse port is dead. my geuss is that the relay is broken but if the relay is broken is it possible that overloading in the wiring is causing this to occur. and replacing it will just cause the problem to reoccur

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thanks guys for the help, i checked the volts on the relay and i checked the volts from the ignition fuse port. both read 12V. i checked the relay and reconnected it but now the ignition fuse port is dead. my geuss is that the relay is broken but if the relay is broken is it possible that overloading in the wiring is causing this to occur. and replacing it will just cause the problem to reoccur

 

Take the relay off and measure the resistance across the coil. possibility that the coil inside the relay has died causing a short. A short in the coil would explain the blown fuse. its not common though...

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thanks guys for the help, i checked the volts on the relay and i checked the volts from the ignition fuse port. both read 12V. i checked the relay and reconnected it but now the ignition fuse port is dead. my geuss is that the relay is broken but if the relay is broken is it possible that overloading in the wiring is causing this to occur. and replacing it will just cause the problem to reoccur

 

Take the relay off and measure the resistance across the coil. possibility that the coil inside the relay has died causing a short. A short in the coil would explain the blown fuse. its not common though...

 

ok iv checked all the wiring for resistance and all is well. when i turn the key, open the circuit without using the ignition key the fuse blows in the ignition port...not the starter relay ignition fuse. the fuse isolating the ignition system blows without cranking the engine. ive checked wiring through the system and all reads good with no minimum resistance. if the starter relay is broken will this cause the ignition fuse to blow even before cranking the engine? my geuss is that the relay only becomes utilized by the circuit when cranking the engine by reducing and relaying the volts to an amount which the circuit can withstand if it fails the the fuse will blow, but if the fuse is blowing before cranking does this mean that its not the starter relay

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the fuse blows in the ignition port as soon as i turn the key on. therefore im geussing it isnt the starter relay all wiring on the bike looks good iv pulled the IGNITION CONTROL MODULE CDI BOX and this has stopped the fuse from blowing on the ignition port. i checked the pins and noticed some corrosion on one of the pins iv cleaned it up as best i could plugged it back in and the fuse blew again

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I've had similar on my Bandit, ign fuse blowing on turning the key, it was a chaffing on the wiring loom near the stock, if you wintered your bike and had to wrestle it in place so may push the bars from lock to lock or do lock to lock putting it away normally its possible to get chaffing. When I was trying to sort this out I got some advice from a bike tech who also said to check the multiplug connectors as corrosion on the earth can create resistance and push the voltage up so much the drain blows the ignition fuse on key.

Hope this helps.

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thanks guys that helps. l check in the chafing points etc.. im getting my fuses for about 3.50$ for 5 each 10amp fuses from atobarn. question will 11.5V blow a 10 amp fuse. i pulled the icu and the reading in the port dropped to .4v running through the ignition fuse port. is it possible that jump starting the bike could have blown the icu igniion control module and this is whats causing it to malfunction. by the sounds of the function of the icu itis meant to regulate sparks at higher revs etc. if the fuse kept blowing at higher revs and gradually to nothing im geussing my best bet is the ecu. i will check for further chafing points first and get back to you gus. thanks heap for the help

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