Waggy,
It seems there might be several things going on with your rig. Your battery voltage readings are all over the place...mostly on the low side of a fully charged 12 volt battery. A modern dash mounted voltmeter should show a continuous reading of just a smidgen under 14 volts all the time (13.8v).
I'm not real familiar with those cooling fans, but I think they draw quite a bit of current. If you had a marginal battery and those suckers came on as soon as you hit the starter, I think you would be in deep schnook!
The starter/solenoid combo can be fussy when it gets hot, but not everyone is. Usually, if it's a problem hot start, the thing will turn over, but very sluggishly. If you only get it to "click", it's telling you that it's the solenoid, and these aren't as heat sensitive.
I would make sure my charging system was working 100%, verify the health of the battery, and figure out if those cooling fans are suppose to pop on as soon as the ignition switch is turned on!
Stuart
