How do I test for bat­tery drain?

Motorcycle News (UK) - - Garage -

My bike’s bat­tery is drain­ing when I’m not us­ing it, which I sus­pect is due to the alarm. I thought I’d dis­con­nect it for a pe­riod and see if that is the cause but I don’t want to leave it un­pro­tected for an ex­tended pe­riod. How do I test for bat­tery drain quickly? Barry Carter, email An­swered by A Chris Dabbs, MCN You need either an am­me­ter or a mul­ti­me­ter set on amps. Take the neg­a­tive lead off the bat­tery and put the pos­i­tive lead from the am­me­ter onto that lead, then put the neg­a­tive lead from the am­me­ter on the neg­a­tive post on the bat­tery so that it forms a cir­cuit but do NOT switch the bike’s ig­ni­tion on dur­ing this pe­riod. The alarm man­ual will state the drain, so you can see if it is that or some­thing else.

Alarms some­times mask other faults

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