--- In milko@..., "martin_200261" <martin_200261@...>
wrote: found the
> battery voltage was down to about 16V (should be 72)

If that's the case then I suspect the cells have all but destroyed
themselves and you're about to discover the economic reality of
lead-acid powered vehicles. I'd keep a voltmeter hooked-up inside the
cab and turn back when it drops to about 65v off-load. You'll probably
be able to reverse from where you are at the time.