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E-Series Vans Technical discussion of topics related to vans powered by any of the Navistar engines. This covers a broad number of years, but there isn't enough demand to split it any further.

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Old 12-13-2005, 07:06 PM   #1 (permalink)
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Grounding and power drain

Has anyone encontered a battery draining problem when plugging in a scanner? I've had a battery drain problem lately and am trying to track it down. Any suggestions? Any wire harness trouble spots you have found in the past as a place to start?

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Old 12-15-2005, 06:22 PM   #2 (permalink)
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Re: Grounding and power drain

I do roadside assistance (i.e. I jumpstart cars with dead batteries). I have concluded that a number of unexplained drains are caused by relays sticking closed, which keeps circuits on that should be off.
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Old 12-16-2005, 06:54 PM   #3 (permalink)
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Re: Grounding and power drain

On the older vans there were some lights ie glove box, brake or under hood that would stay on occasionally. We isolated the bad boys by hooking up a test light from the + terminal on the battery to the disconnected main power wire.......you should have a light on. Pulling fuses one at a time until the light goes out, check the fuse schematic it tells you which items are on that fuse........kinda narrows it down.
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