Horsebox Leisure Battery wiring??

[Louby]

After having my box put on a newer chassis the internal lights etc will not work off the leisure battery. Everything works fine off the generator so Im presuming its something to do with the wiring from the battery.
The bloke who did it, 'did one' a while back thankfully after doing the major work!! and left us in the lurch, so we have had to get the bits left finished off by someone else who cant find the fault. He doesnt normally do horseboxes and has checked relays and they are fine. The battery is fully charged. Im hoping there is an easy and cheap fix to this... any ideas?
Thanks in advance.

 

[keepcalmanddriveon]

Hiya Louby,

There is probably an inline fuse which has blown - thats the simple solve anyway.

Really what you need to do is grab a cheap meter, check various points - battery, input side of the switch, output side, in & out of relay, light fittings etc for voltage & note that voltage down. You should be able to build a picture up of where the problem is with that.

If you need any advice, drop me a DM on here & I'll do my best!