Does anyone know what the connections are for on leisure battery?

[G-A-R-Y]

Just trying to sort out what connections do what, the 200amp is from battery charging relay just behind, one of the 100 goes to supply rear habitation but I'm unsure what the other 100 amp does.
There is also a little red/pink wire.

 

[G-A-R-Y]

I've found the battery fuse diagram but No 9 makes no sense and mine is 100amp.

 

[sidepod]

Starter motor?

 

[sidepod]

Oops sorry, you said leisure battery.
The list isn’t that of a leisure battery.

 

[G-A-R-Y]

Yes it is (it's the picture on the right), that of the battery under the bonnet. See original photo.

Left picture "2" shows where the leisure battery is charged from. That panel is located behind the battery and is a good location for B-B, I'm just unsure about 8,9. Both 100 amp.

 

[Alied]

Oops sorry, you said leisure battery.
The list isn’t that of a leisure battery.

The OP has a Grand California.

 

[G-A-R-Y]

I may have to trace the 100 amp wires back, I know one is for habitation and goes to isolator in technical cupboard, the other may go to the under seat battery charger but seems excessive.

 

[sidepod]

Wiring diagram out of the question then?

 

[G-A-R-Y]

I can only find the Commercial Crafter version. Not Grand California.

 

[WelshGas]

I may have to trace the 100 amp wires back, I know one is for habitation and goes to isolator in technical cupboard, the other may go to the under seat battery charger but seems excessive.

It would be the Split Charge relay, not battery charger.

Why not disconnect one and see what doesn’t work?

 

[G-A-R-Y]

It would be the Split Charge relay, not battery charger.

Why not disconnect one and see what doesn’t work?

No, the split charge relay is N06, the 200 amp fuse, the wire goes to the 100amp relay behind the battery as in my first post. You can see this easily from under bonnet.

 

[sidepod]

I can only find the Commercial Crafter version. Not Grand California.

Given that you don’t know what it is, how do you know it’s not what you need?

 

[secret lemonade drinker]

Positive and Negative?

 

[scotty.aka.dan]

Did you ever work out what each of those cables were providing?

 

[G-A-R-Y]

Did you ever work out what each of those cables were providing?

Yes, as far as I understand it one goes all the way to rear cupboard and supplies the camper, One goes under passenger seat to supply little fuse box (pictured). The third from the VW charge relay situated under bonnet.

View attachment PXL_20260129_133840291.jpg

 

[scotty.aka.dan]

Thanks for the reply Gary, yes I had a little look yesterday. The small wire is the 12V feed for the Shunt, the heavier of the two wires heads to the isolation switch in the rear cupboard, the solar also seems to be connected to this, as with the cable isolated but the solar still connected, there is a varying voltage that tallies with the Solar, remove the fuse from the solar and the voltage disappears. The other cable provides power for the high level living lights, the exterior light and water pump, or at least this is what I've managed to prove so far. There are 5 fuses in the picture, any idea what else that cable powers? I guess the other question that provides the same answer (to an extent) is what else remains powered from the leisure battery under the bonnet with the isolator turned off? any ideas?

 

[G-A-R-Y]

I think only one of the big reds go to the rear isolator switch. The other to that row of aux fuses.

Fuse six is from the under seat battery charger, I blew mine so I remember which one it is.

The under seat charger still trickle charges the engine battery whilst on hook up or when I activate the inverter.