07-01-2014, 12:24 PM
Join Date: Jul 2014
battery dead - permanent electrical leak
I recently bought a 2007 Hemi Pickup truck.
Has been used as a workhorse before...and will be in the future ;O).
I got used to the fact that now and then ABS and Engine light go on and off, and I gave up investing further money with my Dodge dealership to find these bugs.
I use the hemi for recreational purpose and don't care too much. If errors are disappearing by themselves...shouldn't be too serious I guess. When ABS light is on, brakes still work, w/o ABS, but OK - who had ABS when we have been young (at least in my days there weren't even brake boosters...)
There seems to be an electrical problem as the battery is dead if I leave the truck sitting there for a few days.
Lights, Radio etc. definitely switched off.
To narrow down possible root causes i tried the following.
I switched off ignition, pulled key, left truck, closed door.
Then disconnected the positive battery pole and put an amp meter in between.
I can see a permanent draw (leak?) of 1.4amps.
So i started pulling fuse by fuse to figure out which circuit it might be.
I put th efuse back if current did not change.
Result is that fuses #51 (Ignition FCM) as well as Fuse #10 (Ignition Run/ACC) carry about 50% of the current, each.
taking both out reduces current to zero.
Not sure if this procedure is a valid one, but it was the only one I had in mind w/o access to further diagnostics tools.
I do aprecciate any hint, as I will be back in country end of september, where I want to finally eliminate the problem.
Any help very much aprecciated