SOHC.co.uk Forums > CB500/550

Battery Draining

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florence:
Hi, hope someone can help.  When left for more than a day or two the battery drains to flat.  Has anyone else had this problem or am I going to have to put in a battery isolation switch?

Johnwebley:
how old is the battery?

 maybe the rectifier is faulty?

florence:
the battery is new and charges fine but then when it stands for a day or so and I come to ride it it's almost completely flat, which is rather irritating. Is the rectifier in the circuit still when the ignition switch is off?  Maybe the ignition switch is faulty?  Just wondered if anyone else had experienced this to save me going through all the electrics with a meter.  I have to say I'm not sure I would know what to look for anyway ...??

deltarider:
Have there been any changes in the wiring? If you have a DMM you could measure the amps by removing the battery + and connect the meter in between the battery + and the thick + wire. Caution: during this test NO starting or you'll melt the testwires.

florence:
Deltarider, thanks, no changes to the wiring.  I will try your test. 

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