Battery Drain '04 Durango SLT 5.7
Recently we started having a dead battery after the Durango sits for about 8 - 10 hrs (some juice left not enough to start) at 12 - 16 hrs completely dead.
Replaced the battery (which Napa said was bad) and it was dead the next day.
Can jump it and drive an hour with headlights and everything on, does not appear to be alternator related, also starts easily after driving or if parked for up to 6 hours.
Dealership did diagnostic and found Radio was the cause (6 disk in dash changer). Quoted $450 for factory deck....yeah, whatever! So instead had them pull the radio fuse. Dead next day.
Bought a multimeter did a current draw using 10 Amp setting.
Seeing 2 Amp peak but it cycles from 2 Amps down to 1.7 (few seconds), then down to 1.1 (few seconds) then down to .5 for a second then back to 2 amps for 10 seconds. This exact pattern continues for as long as I have the meter connected.
We started pulling fuses to see what changes. Here are the results.
Under dash fuse block:
CBI (or CB1) 25 Amp - drop of .7 amps (no clue what it is)
F14 15 Amp - drop of .2 amps (Data Link / Compass&Temp / Sentry Key Remote Entry / Hands Free) - this is the desc I found not sure if its right. But would makes sense for keyless entry.
Under hood front fuse block (the one closest to the front of the vehicle):
There is a twin 30amp held in with a special clip. No number or description on the cover just says 20A* / 30A** (or something to that affect) Pulling this was a 1 amp drop. Now I'm assuming that one is special in some way. We didnt try any combinations. Also we didnt pull everything (relays or big fuses)
Thought I would start with this.
Also the radio fuse and front cig lighter fuse were already out.
I thought I read that the current draw should be pretty low when sitting, key out, doors closed, like .5 or something.
To sort of validate what I was seeing, while I had the meter connected the door was opened and the reading went from 2 amps to 4 amps which sounds about right for the interior lights and such so I feel my readings are accurate.
I'm really hoping someone could help to answer the following
What is the CBI or CB1 under dash fuse?
What is a normal draw for key out doors closed?
What is the double 30 Amp fuse in the front underhood fuse block for?
I'm willing to try any suggestions, just let me and I'll get back the results ASAP.