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Fuse that runs signals/speedo/tach/ keeps blowing. Was sitting in back of garage for a few years. Bike starts and runs perfectly but blows that fuse. Any thoughts?
 

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Honda: INNOVA125i(2010); CBR250R(2013)
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Fuse that runs signals/speedo/tach/ keeps blowing. Was sitting in back of garage for a few years. Bike starts and runs perfectly but blows that fuse. Any thoughts?
The fuse burns because there is a short circuit on the electrical circuit. You need to find the short circuit. Need to be systematic and tolerant. I suggest you start by disconnecting connectors associated with this circuit, for example, the connector that goes to the dashboard. And the test can be extended to test each pin separately which is not a ground pin, whether it shortens to the ground. For that test you need a short gauge (wire with battery, lamp, and two terminals), or an ometer. Once you find what is shorten, it will be possible to talk about a solution. Try using the electrical diagram shown in Honda's technical guide(p. 21-2...) OR Haynes guide (p.8*40...).
If you feel unsure of this type of job feel free to contact a qualified motorcycle electrician.

P.S.
A motorcycle that has not been used for a long time can develop a variety of problems, and not just in the electrical system. Rubber bands and gaskets that dry out(Oil leaks...etc), rust that may catch the pistons of the brakes .... It is also recommended to replace all fluids. The fact that "Bike starts and runs perfectly" is not enough, and you have to go through all the assemblies, one by one, and check that everything is OK before you going out for a ride.
 

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Do you have multimeter and know how to use it to measure voltage, resistance and current? This is 5-minute fix with multimeter.
 
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