With the days getting a bit longer, and with even the occasional day of sunshine, it was a good time to start getting the split charge relay system and the Numax leisure battery installed. As electrics are not my particular forte, I was glad that James at Rayne Automotive had supplied a set of installation instructions with all of the items, he also sent me over a simple schematic installation PDF diagram which helped clarify things in my visually dominated way of seeing things in my mind! So armed with this and my Schematic wiring diagram for 1963 VW bus (USA) with key (click to download) it was time to make a start on upgrading some of the electrics!
When I was getting the engine serviced at Resto Classics, I took the opportunity of getting them to drill and install a couple of rubber grommets (for cable protection) under the rear seat bulkhead area so that I could run the cables connecting the leisure and start-up batteries required for the split charge relay.
So I carefully feed the main power cable through along with the live feed for the split charge relay itself. The main cable connected to the positive terminal on the starter battery, whilst I fitted a piggy back connector to allow an easy connection for the live feed of the relay to the live terminal on the coil.
I then utilised the heater tube to create a new earthing point under the seat for the relay and leisure battery earths. I carefully drilled a pilot hole through the outer edge of the centre folded join of the heater tube, and then bare metalled the immediate vicinity to allow good contact for the earthing connectors.
Now I was all set to connect up the Numax Accubox leisure battery box, only to find that the overall height of the box just snagged the underside of the seat because of the way the Split screen campers heater pipes come through the bulkhead and go through the cargo floor at a bit of an angle! Fortunately the box had sufficient extra internal height to allow me to trim 10mm off the height all round of the base so that it would fit nice and snuggly under the rear seats and not catch anything! Phew, stage one complete, I know have a working split charge relay and a working leisure battery to connect things unto when parked up! The question is, what do I connect up first!?