We have a MK3 minibus thats been converted to a campervan. We got it last year, and now i'm having a bit of fun with the leisure electrics. Not great with electrics so will try to keep my description as straightforward as I can.
The van has 3 batteries - 2 in the engine bay (one cranking battery and one leisure battery - lets call that one "A") and a leisure battery under the rear seats/bed - "B".
Both A and B have +ve feeds to a Zig CP400 unit. Battery B works fine, as it you would expect (but only charges when on EHU via a power pack/battery charger...thats a job for another day lol)
Battery A is charged via the alternator, and rather than being fitted with a relay, there is an old style battery isolator switch to prevent the cranking battery from being drianed when A is being used.
As its the circuit on battery A thats giving me grief...
The -ve terminal of the battery is earthed via the engine. The +ve feed goes first to the isolator switch, then to a 25amp fuse. The wire then works through the engine bulkhead...through the cab to the top connector of a switch on the Zig unit. The feed from Battery B goes to the bottom of the switch.
There is 12.5v at every point on the live from A. At the battery...at the isolator, at either side of the fuse....even at the spade connector that plugs into the Zig Switch.....but no current. Reversing the feeds so B is on the top of switch and A is at bottom shows that the switch is ok because when set up that way, the circuit on B performs as well as it does on the other side of the switch.
I know that the set-up worked when we first got the van otherwise I would swear that it never had
So....as I'm running out of ideas on what/how to check...What can cause voltage to be at the connector but no current?
Any ideas/suggestions or explanations gratefully received.
Cheers
