Join Date: Sep 2018
Location: West Coast Florida
I think it may be time to pull the battery and go to your local parts store and have it load tested. Your tender likely only will give an indication of acceptable voltage, but you may, in effect have a 12-volt battery that doesn't have enough amperage to light a bulb. Just for kicks, if you have a 12v bulb and socket lying around, disconnect the temder and jumper the bulb across the battery terminals and see if it is producing enough juice to even light a bulb. Just a thought.. Or just take a piece of 18 ga. wire long enough to bridge the battery terminals and see if you get a resounding SNAP!/spark.. If not, your battery may have voltage, but too much internal resistance to put out any amps.
If it jams, force it. If it breaks it needed replacing anyway.