^x2! just because it says 12.6 volts doesn't mean its a good battery.

 

I agree what my Cherokee. Used to do was fuelpump would keep running. I changed the relay it fixed the problem. Of drainage my guess is it could be that ur AC clutch staying on or maybe a glovebox liight just my 2 pennies

 

The first place to start with an electrical problem is the BATTERY, once it checks out ok, then you can start throwing wild a$$ guesses at it.

 

This is what you want to do.

 

sorry, wrong thread

 

Alright i did some more tests and it turned out my battery was bad... was from and 4/09 so it was about 4 years old... I think the alt overheated and caused a bad cell in the battery... New duralast gold for 80 bucks and im good to go!!

 

I run marine. Batteries. No spill gel cell can get em at most. Battery. Places. For 50-100$ although. Optimas are a good marine battery. To

 

Ive heard that the deep cycle batteries are bad for your alternator... cant say why they just are

 

I've ran em for years. N only time my alternator. Fails is in muddysandwater

 

Bat can test with 13 volts but could have a dead cell. I had a similar issue. I thought something was draining the battery but turned out to have a dead cell. Tested good on a volt meter and bat tester but would not crank the jeep. Dead cell too away from the cranking amps. I replaced My batt and no issues since. I thought I had a draw just because of how it would seem to go dead so fast. I tested to see if it had a draw by simply un hooking bat over night after jumping and letting set to charge. hooked back up in morning and sure enough no crank but had 12volts.

 

Pretty similar to what i had to do... I tested how many amps the system was drawing between the terminal and post and it was so minuscule that i knew there wasnt anything draining it... well its all good to go for now... Tomorrow im gonna hook up all my accessories to it again and change the OFA o ring and maybe go oversized filter...