It's probably worth investing in one? A cheap Chinese one will do the job for checking voltage and resistance and they can be had for for little more than a fiver.

http://www.ebay.co.uk/sch/i.html?_from=R40&_trksid=p3984.m570.l1313.TR6.TRC1 .A0.H0.Xmultimeter.TRS0&_nkw=multimeter&_sacat=0

Or get one from Halfrauds, not as cheap, but still not expensive and you'll get plenty of use out of it owning an XT!

They're dead easy to use and most come with instructions to perform basic tests.

For now though, you should be able to check the fuse(s) visually and how secure the battery terminals are. If you can get hold of a 12V bulb and a couple of wires you can connect it across the battery terminals and see if there's any life there at all.

The main 30A fuse to focus on look something like this... (The right hand one is a spare which you can use to swap.)



Just out of interest, a couple of questions:

How long had it been (before you went to it this morning) since it last ran?

Is there anything fitted that could be draining the battery? Sat Nav, power leads, phone chargers, even a usb outlet without anything plugged in draws current.

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