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  1. R

    Only AUX batteries getting charged, OEM batteries are not

    Yes, I encased the soldered connector in shrink wrap and then wrapped rubber membrane around it with zip ties and secured it to the frame. It feels so great to have 4 batteries again!
  2. R

    Only AUX batteries getting charged, OEM batteries are not

    This is the problem battery cable, size 3/0. It's been replaced and all is right with the world! Thanks again for the input.
  3. R

    Only AUX batteries getting charged, OEM batteries are not

    Problem Discovered. I traced all the battery cables (and there are a lot of them in this old ambulance and difficult to see because everything is so cramped). I found the main battery cable runs down the frame toward the isolator. The cable was frayed by rubbing against the frame beside the...
  4. R

    Only AUX batteries getting charged, OEM batteries are not

    Thanks for responding, The switch creates/breaks a connection between cables 1 and 7. Basically it is a jumper between the left terminal and the far right terminal. The gauges show sufficient voltage to charge, but only the left terminal (the one AUX and OEM are attached to) is getting...
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    Only AUX batteries getting charged, OEM batteries are not

    I have a retired ambulance (2002 E-450). It has a battery separator/isolator under the passenger seat accessed via the door well (i.e. where you put your foot to climb into the van). A 2 position battery switch is behind the passenger seat base. It has two positions: OEM ONLY and OEM PLUS...
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