Question about 1995 Dodge Ram 3500

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Battery Drain when parked.

'95 Dodge Van 3500 5.9 When connecting/disconnecting battery terminal, a sizeable spark occurs (must be 1-2 AMPS)There are no devices on except the remote door lock, which is always on standby. The charge system checks out,posts clean,etc, and the vehicle starts (and charges) well if not parked for more than 2 days. (2nd day it cranks slower) This unit is a class B motorhome with a 120 amp alternator and isolator, and the rear battery bank is unaffected. Does anyone have experience with this manufacturer/model that gives a clue to the likely power drain?

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  • dave lafontaine
    dave lafontaine Apr 02, 2014

    I had a similar problem that I tracked down to the time delay relay located under glove box insert. Mine would get really hot and was drawing .5 amps. When I removed it my battery drain problem went away. I bought a new relay and installed it and it got really hot also, so the device itself wasn't the problem but removing it stop the battery drain. Go figure.

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First off, how old is the battery? It is possible it might be stratified and its just no longer holding a charge well. I've had batteries that are 2 or 3 years old and then they just go dead if I don't start them up every day or so. (Some batteries are just made better than others) If the battery is brand new, then check for some possible wiring shorts. Try looking at the engine running in the dark and try moving around the wiring harness to see if by chance you see any sparks or arcs of electricity. Other than that, you might have to have a qualified auto electric mechanic to check it out for any abnormal power drains.

Posted on Jul 30, 2009

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