2 amp leisure fuse to control panel intermittent blowing.

[Keithrm]

I have a Burstner Eliseo which uses a Schaudt. 119 Elektroblock. There is an intermittent ground short on the 2 amp circuit, fuse next to leisure batteries. When fault exists I have a dead short to ground on the output side of the fuse. I've checked cable continuity and to earth from fuse to block 3 pin 5 and ok. Disconnected L100 outputs to water x 2 sensors but no difference. Currently all working ok ( left water sensors disconnected) and waiting for it to fail again to continue fault finding. Any help much appreciated.

 

[GeoffnDee]

On the ebl119 wiring diagram the leisure battery 2a fused EBL sensor supply appears to go to pin 5 block 2 with its negative side being at pin 2 (pin 5 block 3 , is 12v indicator , with pin 11 being + sensor and pin 2 being - sensor )

 

[Keithrm]

On the ebl119 wiring diagram the leisure battery 2a fused EBL sensor supply appears to go to pin 5 block 2 with its negative side being at pin 2 (pin 5 block 3 , is 12v indicator , with pin 11 being + sensor and pin 2 being - sensor )

Thanks. Yes i

On the ebl119 wiring diagram the leisure battery 2a fused EBL sensor supply appears to go to pin 5 block 2 with its negative side being at pin 2 (pin 5 block 3 , is 12v indicator , with pin 11 being + sensor and pin 2 being - sensor )

Thanks, yes I have the wiring diagram. The issue is everything works and tests ok. Then when the fault occurs there is a short which when I last started to trace it, it disappeared again. I'm thinking it could be a problem with the plug and socket on the 119 unit and by moving cables/plugs it clears the fault. It's unlikely to be an electronic failure in the unit as they are usually terminal.
K