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Discussion Starter · #1 ·
Hi guys, silly question really but I want to be sure. Can I wire the secondary batt to the body or does it have to be connected to the chassis? The wire I got with my split charge system is tiny, so it would be more convenient to connect it to the body. :ILU:

Cheers guys :D
 

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The negative of your camper battery goes to vehicle body (earth)
Pin 85 on the relay also goes to earth.
Pin 86 goes to a 'switched ingnition-on' live, this could be coming from the wire on your alternator that goes to the charge light on your dsahboard, its easy to find - the wire is the thin cable on a single connector on the back of your alternator, or you could even wire it to something else that is only 'live' when the ignition is on (radio for example)
The other two pins are connected to the live terminals of the batteries.
Pin 30 to engine battery, pin 87 to leisure battery.

It really is simple - honest, 4 wires!

Then as soon as the engine is started - your leisure battery is charging, as soon as you turn the ignition off - it stops charging and the leisure battery is completely disconnected from your engine battery, so no chance of flattening it.
 
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