Post #8
Bit of an update.
Ok located the Bitron unit, its up inside the near side front wheel arch where the two horns and the alarm siren sit. Its not too bad to get to, you need to just remove the plastic guard that goes between the arch liner and the bumper, once removed I found it easier to unbolt one of the horns (13mm spanner) then with a torch you will see the 'Bitron'(electronic control unit for the fans)which is bolted to the roof of the wheel arch by two M5 nuts(8mm socket required).
Next unplug the electrical connector, it has a red part that you pull out while pulling up on the connector, I noticed a couple of the pins on the Bitron unit coroded and gave them a squirt of WD40 and a wire brush up, I also gave the connector a squirt (because of the length of cable you struggle to access this well)and my fan problem is now resolved.
Whilst here I also removed the plugs from both horns and the siren and gave them the WD treatment, even if you have no issue with your fans I would recommend doing this as a bit of preventative maintenance, as the first time you realise your fans aren't working will be next summer when your car starts overheating!
Whilst on a mission I removed the front centre trim panel between the headlights and popped open the fan relay box (sits in a triangular shape between both fans). I noticed the 3 relays in here all had signs of a little corrosion to the terminals so cleaned them up accordingly.
Thanks to Trell for mentioning the control box 'Bitron' unit.
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Previous Peugeot - 2000(w)GTI-6, Me old China, Supercharged with working aircon!