Question about 1982 kawasaki Z 250 C

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250 z kawa 82 ,runs but won't charge battery, has had battery connected wrong way. any ideas,has apprently been to auto elect, but no help.

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It's possible that when the wires were connected the wrong way it could have caused a short in the electrical system that charges the battery. I'd suggest you change those first.

Posted on Mar 14, 2011


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The meter is telling you approximately how much current (amps) it is sending to the battery. When the meter moves all of the way to the right it is charging as hard as it can (that would be 6 Amps) which indicates that the battery needs a lot of charging. As the battery becomes saturated with charge, the meter will move toward the left. As the battery become charged, the unit automatically tapers off the current. The meter can indicate as little as little as zero Amps, meaning it is not charging the battery at all - which is the case when the battery is powered up, but isn't even connected to the battery. If it reads zero when it's connected to the battery, the battery is broken and can't be charged.
Since this charger is rated at 6 amps, it will indicate about 3 amps when the battery is about done. It won't normally go to zero because those 3 amps are getting wasted just heating up the battery.

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Did some extensive searching for you. You may need to call an old school Yamaha mechanic to pull that one up for you. Tpo give you an idea of what was being produced back then, found this list ...
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regards robotek

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You have a poor connectioin somewhere due to corrosion. I would begin by cleaning up the battery poles and the cables there. Then trace each battery wire and clean the other end with special attention to the ground wire where it is connected to the frame. Finally get a can electronic spray from any auto parts store and spray all of the connections in the headlight.

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