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First of all, I'm dutch so some stuff might be unclear, please tell me if this is the case so i can explain things better.
My father owns a Ford Mondeo Wagon (stationcar) from 1996, it's a diesel. About a year ago when we where on holiday in France, a fuse kept blowing (I'm not sure wich fuse, sorry), when it blew the airconditiong light stopped working (I think the airco-fan itself too but i'm not sure), the clock, the indicators and maybe other things aswell. My dad found out it has something to do with the electrical system for the engine cooling. It happens only during warm weather in combination with a trailer behind the car (engine has to deliver more power) or during traffic jams in warm weather (no cooling of the engine due to no air flow cooling). It seems that when the fan that cools the engine kicks into a higher speed, a shorcut happens. My dad thought it was a problem in the relay that controlls this, and i think he put in a new one, but i'm not sure. Also, having the airco-fan on at 4 the whole time seemed to make the problem happen less often (i guess the airco fan helps cooling a bit).

The problem started occuring last summer and then didn't happen again untill about a month ago, and my dad just phoned from france (another holiday) the same thing is happening again. He asked me to look up the electral scheme for the cooling of this mondeo, but i haven't found it yet. Can anyone help me with this scheme or the solution to this problem? Somebody suggested a wire may be exposed to the metal of the chassis, any comments on that?

Thanks to anybody who took the time for this long read and A LOT of thanks to anyone who can help me with this problem, since i'm visiting him on thursday the 30th, and i hope i can take the answer with me.

 

LunaticSVT

I would put in a larger fuse than what is being used.

You could have a wire exposed and that will require you to trace down the lines. It could be anywhere.