small radiator fan

[Foxhill]

Have thought of running a switch to the small radiator fan for extra cooling when towing my caravan. After reading a thread explaining how to do this have found that the fan does not run when disconecting the wire from either thermostat housing sensors or when i switch the aircon on. I have noticed a small crack in the centre part of the front sensor next to the connector. Can I get this part from milners is it probably this or something else. Can anyone confirm what this fan does anyway. Help appreciated.

[Simon.O.]

The electric fan.....this IS my area of knowledge.
First thing is you have established that it does not work when you disconnect the wire from the T-stat??
Does the fan work........believe me I spent hours mucking about before I found out thta my fan was poked. If so replace the fan.
After that it is pretty basic electrics to make a on off circuit for it.
The temp-switch in the T-stat housing is an ''earth-loss'' set-up, from here it is very easy to work out how to run the fan yourself.
I have an automatic + manual fan control system in addition to an over-temp warning system with test features and over-ride functions for both.
I am on leave at the moment but as soon as I get back to ''work'' will run up a set of plans that will go on the Aussie ''Surf Tech site'' Have a look there and you will find all sorts of goodies and my fan-set-up soon !!
If you have a very basic understanding of electrics you will work it out before I have sent my stuff to Australia !!
Cheers and beers