Why are my headlights draining my battery - Triumph Forum: Triumph Rat Motorcycle Forums
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post #1 of 5 (permalink) Old 11-26-2012, 12:50 PM Thread Starter
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Why are my headlights draining my battery

Could this be a relay or something. When they are unplugged the battery fina at tickover but when I plug them back in it drains the battery quite fast at tickover. If its revving its fine.

I know people have said dodgy R/R but I have tried a couple of them now and its the same.
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post #2 of 5 (permalink) Old 11-26-2012, 01:29 PM
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You have a generating system failure - if not the R/R, probably the stator.

Simplest test for stator - unplug it and leave ignition/engine off.
Measure resistance from any of the three pins to any engine ground point:
if short, your stator is toast.
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post #3 of 5 (permalink) Old 11-26-2012, 05:01 PM
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What is your charging voltage at idle?
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post #4 of 5 (permalink) Old 12-02-2012, 08:11 PM
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Condition of your battery?

Not the volts, but the CCA. New they are in the 180 ball park. It can show 12+ volts but with no amps behind it, it won't do anything and the lights will drain the battery very quickly.

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post #5 of 5 (permalink) Old 12-02-2012, 08:15 PM
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^^^ irrelevant once bike is started
Definitely a generating system problem.
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