MX2: Auxillary Power

Posted on Posted in MX2: 2001 Ford Ranger

Usually on electrical portions of my projects I go a bit overboard. I’ll be doing the same on this occasion. First I start with upgrading the stock battery terminals to military grade ones I got from Wil (Sierra Expeditions).

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Then some heavy duty commercial grade terminal connectors are crimped on.

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Special heat shrink tubing is added to help stop corrosion.

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Onto the brains of the system, for this I’m using a National Luna power pack. For those that are not familiar with this unit I’ll give you a quick synopsis. The National Luna power pack is smart battery management system that automatically charges your second (camper) battery after your main (starting) battery is charged.

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The wire that comes with the kit is a large gauge and has plenty of insulation.

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Now here’s were I go overboard… And please, if you try to copy me, do it at your own risk! I open the panel on the power pack and connect two leads off the main battery terminals for my own power distribution box.

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I drill appropriate holes and bolt on a plastic terminal box, but not before pulling the 8 gauge leads into the box.

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After reassembling the power pack I begin mounting it inside the cab of the truck. For this I use jack nuts. (Update: don’t use jack nuts. The are good for one time use then are a pain in the ass)

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Power pack mounted behind the driver seat.

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On to the control wires, which is a multi conductor cable with 10 wires from the MX1’s wiring.

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I connect eight of the leads onto three switches. Since I’m reusing old parts I test the resistance with a meter.

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After everything checks out ok I wrap the exposed ends in electrical tape.

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The wires have numbers printed on the insulation. I write down on paper what wire number connects what switch.

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I then reinstall the switches in the dash panel.

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Then I run the multi conductor underneath the carpeting to where my power distribution box is.

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Next I strip back the outer casing then clip in the Anderson plug to the power pack.

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Worried about chafing the power leads I run them through two separate rubber grommets.

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Underneath the cab I continue running the wires forward to the battery.

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At the battery I cut off the excess and crimp on terminals.

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I use special shrink tubing again that has a inner sealant that melts and covers the outer edges of the shrink tubing.

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A section of the wire is cut to insert a fuse box.

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Back at the power box I crimp connectors onto the control wires then attach them to the terminal block. (Fuses to be added)

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Next post I start working on the lighting.