I had this. Bottom loom connector will be corroded, and the series 12v fan positive is broken (you can check voltage, theres an faq). When stage 2 kicks in at 105 the relays change to engage parallel fan operation, the second live switching in starts the second fan. I ran a separate 12v to the relay from the battery with a fuse inline, still worked 5 years later.
Guide: http://306oc.co.uk/forum/thread-5185.html
My issue with pic: http://www.306gti6.com/forum/showthread.php?id=119690
Guide: http://306oc.co.uk/forum/thread-5185.html
My issue with pic: http://www.306gti6.com/forum/showthread.php?id=119690
Night Blue VW Golf 7 GTD : Bianca 306 Rallye : Mini Cooper D (The Mrs')
HDi Owner for 200k/9 years
HDi Owner for 200k/9 years