Testing a generator off the engine is not an effective way to do it. That doesn't include the rest of the charging system in the tests. You really couldn't have included less information with which to make a diagnosis, so lets start with figuring out if the charging system is not keeping the battery charged, or if the battery is being drained when the engine is off. Use an inexpensive digital voltmeter to measure the battery's voltage, first with the engine off, then with it running. Post those numbers in your reply. They should be measured to at least one place after the decimal point, but two is better. The meter should be on the 20-volt range.
How old is the battery?
Tuesday, January 2nd, 2018 AT 3:42 PM
