Split Charge Circuits - MarcleLeisure Split charge diode blocks any problems associated with the above relays and provide a good positive supply to both battery banks, whilst maintaining total isolation between them. The split charge diode blocks are incredibly easy to install, as shown in the following drawing. How to install a leisure battery with split charging - YouTube May 22, 2017This is a simple how-to video on installing leisure electrics in your vehicle. Related searches for split charge relay wiring diagram relay wiring diagramhow relays work and wiring diagramsplit charge relay5 wire relay wiring diagram12v relay wiring diagram24v relay wiring diagramhorn relay wiring diagram4 pin relay wiring diagram