Split charge relay fault?

[Bosco Taylor]

Can anyone advise me?
My California interior lights and appliances only work when the engine is running or I bridge the split charge relay (shown in green) I've just had the Varta leisure batteries out on a charger so I know they are healthy.

Any ideas?

Off on a camping trip tomorrow!

All the best
B

 

[sidepod]

Fuse on the leisure battery(s)?

 

[Perfectos]

Possibly

Split charging relay question

There is a relay under the passenger seat that is energised when the engine is running, connecting the starter battery to the leissure battery/s so they are charged whilst the engine runs. In my solar charger instructions specifically for the WRM15 dual battery charger I advise connecting to...

vwcaliforniaclub.com

 

[Bosco Taylor]

I've noticed that the control panel is not seeing the battery! it has no readout of its state of charge. Should be bottom right corner.

Chat GPT tells me there is a dedicated shunt for voltage detection and this has an inline fuse that might have blown.

Can anyone tell me how to check the system the control panel uses to sense voltage in my 2009 T5 Ocean.

All the best
B

 

[Perfectos]

Check the white fuse in your first photo (the one in the single holder that appears to be touching the seat nut , in the photo) the one the blue arrow points to in the pic below

 

[Perfectos]

Alternatively (see post #2)

Fuse on positive leisure battery terminal

I keep reading about this fuse on the rear leisure battery but it is not present on mine. Where is the fuse for leisure batteries?

vwcaliforniaclub.com

 

[WelshGas]

I've noticed that the control panel is not seeing the battery! it has no readout of its state of charge. Should be bottom right corner.

Chat GPT tells me there is a dedicated shunt for voltage detection and this has an inline fuse that might have blown.

Can anyone tell me how to check the system the control panel uses to sense voltage in my 2009 T5 Ocean.

All the best
B

From what you have said so far:-
The Leisure electrics work when the Engine is running and when you short out the Split charge relay? In this scenario the engine battery/ alternator are powering the Leisure system.
When you have the engine running do you see a voltage reading on the Control Panel?
If you are seeing a voltage reading then it would appear there is No power from the Leisure Batteries. Either they are flat or they are not connected or a fuse has blown.

Here is a basic circuit diagram.