I found that my battery would drain overnight. It has a new alternator that puts out about 14 volts. It is a 2001 Grand Caravan with a 3.3l engine.
I was told be two auto parts stores that the battery was bad. Before I installed the new battery, I checked the current drain. The old battery was disconnected completely overnight. I found that it was over 800 mA. I started pulling fuses and found that with the HZD LP fuse removed, the current would drop to 65 mA. The current would jump up again to 800 mA with the fuse installed. I found that the turn signals and instrument panel does not work without this fuse. The radio had stopped working about 6 months ago so I decided to disconnect it but that didn't affect the problem.
I was wondering what else I can disconnect to determine what is actually causing the drain on this circuit?
Thanks

 

Looking at a power distribution diagram, that fuse powers the BCM, cluster and message center if equipped. Pull the IOD fuse and see if you get the same drop. That would point to the BCM. Unfortunately there are many circuits connected to the BCM that could cause a drain.

BTW - Are you taking a reading around 15 minutes after you disconnect the battery cable. The modules need time to "sleep" before taking a reading.

 

Thanks Cougar
I disconnected the instrument cluster and found that it had the same result as pulling the HZD LP fuse. My current went from 800 mA to 65 mA.
Does the cluster have to be replaced or is there a common fix? Also, I looked at the part number on the cluster and it ends with a 749AE. There are many on Ebay with the ending number 748AE. Do you happen to know the difference because they look the same?
Thanks

 

Common cluster fix? If you had a 3rd generation van yes, but not on your 4th gen van that I know of. That said, since you have it out remove the circuit board, flip it over and look for any cracked solder joints or anything else amiss. That's the 3rd gens problem. No idea what the part number differences mean.

 

4685748AE = "120 MPH White Face, 4 Speed"
4685749AE = "200 KPH White Face, 4 Speed"

George

 

Thanks georgef. My van originally was sold in Canada before I bought it from a dealer in the states. Obviously mine was converted to mph from kph by the dealer. Looks like the 748AE would be my best choice now.