I have a 1987 Talbot Express coachbuilt motorhome, D reg. This weekend it kept on overheating, I noticed the fan is not working, but their is no voltage going to the fan, so the fan cannot be at fault, any idea's?
The fan might still be faulty, however there is probably a thermostatic switch somewhere, which "switches on the fan" when it reaches a certain high temprature. You can try and follow the wires from the back of the fan to the "switch". You can remove the switch and test it in a pot of boiling water on the bench or just replace it if its only a few quid. Be carefull with the hot water.
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Try fixfault.com to fix caravans/motorhomes.