OK
this is an old escort van (1991 i think), 1.8 non turbo, not mine but the old mans work van
I am pretty sure it's electrical
anyway. It ran out of fuel and obviously stopped. Got the thing working again after some faffing about, he drove it to work and back then the next day, nothing.
It won't turn the engine or even try to start.
If you get in the van and look at say, the little dash board clock it's bold and visible - but if you make a turn of the key it dims, turn again and it's barely visible, then if you turn the key as if you was starting the van, everything is totally dead except the usual parking brake light etc.
Same thing happens if you get in and turn the interior light on, the clock dims etc as if it's getting no electrics
It's not the battery, I've tried a known good battery (from our rover 200 vi) and the existing battery has been on a multi-meter and checks out fine.
I've looked over all the wiring under the bonnet as best I can and there do not appear to be any shorts or shitty connections etc