Posted by joe csuti on September 06, 2013 at 13:58:31 from (4.248.79.242):
In Reply to: John Deere L100 posted by frank whitehead on September 06, 2013 at 10:38:19:
Connect a voltmeter to battery terminals,start eng and run at 3/4-full throttle,battery voltage should rise to 14-14.5 volts if charging system working.
If voltage doesn't rise,starting at eng & working into wiring harness check for a blown fuse in an inline holder or in fuse block(if tractor has)many mod briggs eng had a fuse on alt output which may be blown.
If you can't find fuse/any blown fuses,then goto local mower shop(s)briggs website or ebay & buy a service/repair manual that covers your mod eng,the eng in your tractor was avail with four different alt stators & two different style charging systems,the manual will help you id charging system & troubleshoot same,depending on charging system AC voltage from alt varies,you'll need manual for AC voltage spec to troubleshoot alt stator.
Before doing any of the above first check battery with a hydrometer or remove & have load checked,you may just have a battery that has weak/bad cells & not takeing/holding a charge.
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