[TCaleb4323]

I have a 2004 Nissan Titan 5.6L and just replaced battery with a brand new one. Every morning battery is completely dead. No lights were left on and keys were taken out. No reason for being dead. With a charge it starts right up. Something is draining the battery. Need some help to know what it could be. Went through fuses and cleaned terminals. Still the same. Dead every morning. Anybody know what that could be?

 

[dubyam]

It could be two things. First, it could easily be a dead cell. You should have the shop where you bought the battery test it for that. Or you can test it at home, using this procedure:

Geeks On Cars: How to Test for a Bad Cell in 12V Automotive Battery

You could also have a parasitic draw somewhere in the truck. If the above test shows the battery to be good, follow these instructions to find the parasitic draw:

How to Find a Parasitic Battery Drain: 9 Steps (with Pictures)

Of special interest here is that it could be a diode in your alternator, so if you can't find a draw via the fuse boxes, unplug the alternator and see if that solves it. If so, replace the alternator. Wouldn't be beyond the realm of possibilities for the alternator to be dying on a 2004 truck.