Leisure battery and split charge relay
Way back when I got the new engine fitted, my garage told me they would have to strip out the secondary electrics (battery and split charge relay) that I had fitted a few years previously (they were pressure washing the engine bay, so it made sense) - they also told me it wasn't working, which was news to me. But hey ho. So today I re-fitted it.
I couldn't remember which wires fitted to which terminals, so last week me and Dad (when he was down visiting) did some playing with the black box (i.e. took it apart) and made a circuit diagram. It's quite a neat little gizmo (it's called a Combo Split Charge Relay, and I can't remember the brand, but I bought it from a local caravan electrics shop when I lived in Bournemouth). Basically, a single live wire charges two separate relays (hence 'combo') that close two switches to allow power from the main battery out to two terminals (nominally, one for a fridge/cooler, the other to charge the leisure battery).
It was a piece of piss to fit the thing, mainly because I'd done it before and all the holes and wires were still in place. The longest part of the job - about 20 minutes - was spent sanding down the nearest earth terminal of rust so that it was a sound connection. I suspect this is why it wasn't working that day when the garage man stripped it out. I really need to secure the battery somehow, but it's really not going anywhere in a hurry.
I couldn't remember which wires fitted to which terminals, so last week me and Dad (when he was down visiting) did some playing with the black box (i.e. took it apart) and made a circuit diagram. It's quite a neat little gizmo (it's called a Combo Split Charge Relay, and I can't remember the brand, but I bought it from a local caravan electrics shop when I lived in Bournemouth). Basically, a single live wire charges two separate relays (hence 'combo') that close two switches to allow power from the main battery out to two terminals (nominally, one for a fridge/cooler, the other to charge the leisure battery).
It was a piece of piss to fit the thing, mainly because I'd done it before and all the holes and wires were still in place. The longest part of the job - about 20 minutes - was spent sanding down the nearest earth terminal of rust so that it was a sound connection. I suspect this is why it wasn't working that day when the garage man stripped it out. I really need to secure the battery somehow, but it's really not going anywhere in a hurry.