Disconnect your vehicles battery earth strap.
I fisrt ran the thick red cable from near my leisure battery to the front
of the car. I simply poked it through one of the existing grommets in
the engine bay, then ran it underneath the car avoiding any sharp edges
and securing it with cable ties and then up into the cabin right at the
front. The inline fuse should be as close to the leisure battery as possible.
Next I fitted my fusebox in a convenient place under the dashboard. You
can fit it whereever it suits you best. Then I fitted a spade connector
to the end of my main feed and hooked it up to the fusebox. You will somehow
have to split up the main feed several times, once for each point at the
fusebox you want to use. I haven't found an elegant way of doing this
yet, I simply looped another wire a few times.
Next I looked for a place to fit my relay and decided on the place the
spare wheel used to be, on the left in the rear of the van. This is a
place close to the leisure battery so I won't need to run miles of cable.
Now all you need to do is wire everything together. To do that you need
to run a wire from the relay to a cable which is live when the ignition
is on . I think it is even
better to hook it to the generator warning light as this is only live
when the ignition is on AND the engine is running. The generator warning
light is often a thin blue wire somewhere in the engine bay.
You also need a live feed from the starter battery to the relay (the light
blue wire in my diagram).
You should use a fairly heavy duty wire for this and fit a fuse near the
battery. My relay had the wire supplied and also instructions of how to
fit it. On the photos this is the red wire which, together with the thinner
blue one, runs from one side of the engine bay to the other one.
Then I connected the quick release terminals to the battery together with
the green cable from the
relay (the battery charge) and the red wire
to the fusebox. I then made sure I had a good earth connection on my leisure
battery and after checking all connections again I reconnected my starter
batterys earth strap.
If everything is the way it should be then the terminal on the relay which
has the green wire attached (leisure battery charge) only has current
when the engine is running and should then read 13.8 Volt. Note that unless
you connect all camping equipment to the new fuse box you will still be
able to drain your starter battery. Your headlights for example will also
still drain your starter battery unless they are switched over to the
new fuse box, same goes for any other electrical equipment.
The whole procedure took me about three hours.
Any questions, suggestions, comments? Email