Nearly dead battery
I have a battery cutoff switch to my TT battery. It was discounted from the TT. I switched it on and went inside and the battery was nearly dead. It was fully charged when it was switched off. What w...
Forum Discussion
Start from scratch...
Charge the battery and have it load tested. You CANNOT do this at home unless you have a regular battery charger and a 500 amp carbon pile load tester. A battery distributor can do it.
But first MARK ALL WIRES BEFORE YOU DISCONNECT THEM.
If the battery tests bad replace it.
Buy a cheap 12 volt test light. The kind without batteries inside.
When reconnecting the tested-good or new battery connect the POSITIVE FIRST. Leave the negative disconnected.
Clip the test light clamp onto the ground wires that lay disconnected from the battery terminal.
Grab the test light and touch the tip to the positive post, the one that remained disconnected.
Does the light light up?
Yes. You have a draw somewhere. Your disconnect switch is bypassed or shorted somewhere. Leave the negative wire disconnected until you get around to fixing what's wrong.
No. Congratulations on your new battery. The old battery was bad.
Charge the battery and have it load tested. You CANNOT do this at home unless you have a regular battery charger and a 500 amp carbon pile load tester. A battery distributor can do it.
But first MARK ALL WIRES BEFORE YOU DISCONNECT THEM.
If the battery tests bad replace it.
Buy a cheap 12 volt test light. The kind without batteries inside.
When reconnecting the tested-good or new battery connect the POSITIVE FIRST. Leave the negative disconnected.
Clip the test light clamp onto the ground wires that lay disconnected from the battery terminal.
Grab the test light and touch the tip to the positive post, the one that remained disconnected.
Does the light light up?
Yes. You have a draw somewhere. Your disconnect switch is bypassed or shorted somewhere. Leave the negative wire disconnected until you get around to fixing what's wrong.
No. Congratulations on your new battery. The old battery was bad.
