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I have a '02 E350 powerstroke diesel that i am having some electrical issues with. If I let the truck sit for about 3-5 days without being driven the batterys drain down and the truck will not start. This happened a couple weeks ago and i thought I had the problem fixed. Turns out after trying to start the truck today I do not. Previously I was having a problem with the truck locking itself automaticlly. It has power locks. I thought I had a issue with the module that controls the locks basiclly continually trying to lock the truck. I disconnected the module and that locking problem was fixed. I thought that also fixed the drain on the batterys but it did not.
Today I go out to start the truck and the batterys are both dead. Very little juice in them. Not even enough to turn the truck over at all let alone slow. It would appear as if I have some sort of parasitic draw on the batterys. Any ideas? I have kind of ruled out the lock module as it is not even connected right now.
While I never had to deal with this myself, here are some suggestions.
Hook up a multimeter capable fo testing amps between the positive battery post and postive wire. Be careful with this, too much current through the meter and poof. Do not turn the ignition, lights, or anything else on.
At the fuse panel start removing and replacing fuses until you find the offending circuit. From there, happy hunting. Good luck with this. Hopefully it is an easy fix. Electrical stuff like this sucks.
Also, be sure you have nothing pluged into any power ports (cigarette lighter) and there are no lights or equipment left on anywhere in the van.
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