B2B with Split Charge Relay

[jezport]

There is a second feed from the starter battery for other items. It comes in at the front of the EBL on the 5-way Block2 connector, Pi1 positive, Pin4 negative. There is a separate 20A fuse on this wire near the starter battery. After going through he fridge relay it comes out on the 4-way Block1 connector, Pin1 or Pin4 positive, Pin 3 negative, and then goes to the fridge.

The starter battery trickle charging on EHU uses the wire on Block2 Pin1, which is also used by the display panel for measuring the starter battery voltage.

So what actually does go through the main cab battery connection on the other side of the EBL? Is it just the charging input from the alternator?

 

[Pausim]

So what actually does go through the main cab battery connection on the other side of the EBL? Is it just the charging input from the alternator?

It is connected to the engine battery, which in turn gets charged by the alternator. When the engine is running a relay within the EBL connects the engine battery to the leisure battery. If you fit a B2B directly to the leisure battery the original connection through the EBL must be disconnected or disabled.