Posted by Jacks on January 07, 2018 at 18:53:10 from (72.218.81.234):
In Reply to: Re: Battery drain posted by Steve@Advance on January 07, 2018 at 15:54:25:
I agree with Steve's advice above, however you may also use a volt meter with an amp function instead of a test light. To measure amps typically requires placing one of the meter test leads in the plug in marked amps. Assuming that ECM's on tractors could be similar to automotive units, the electronics may go through a shutdown sequence. It can take at least 15 minutes for an ECM or similar control unit to shutdown to a residual current draw level. If you have a factory service manual, it should state the allowable ignition off current draw. As a rule of thumb, a residual current draw of 20 ma or less is probably ok, 50 ma or more indicates a problem. Even on equipment without electronics, i still like to know the milliamp draw.
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