changed a headlight bulb 6 weeks ago, wife drove back from break (in the rain) heater, wipers, temp gauge zero,said bonnet open heated windscreen etc all stopped working. rang ford dealer, possibly knocked earth connection under headlight section, checked it and it did the trick. yesterday out in the rain same again, no heather and heated windscreen, is the water getting on some of the electrics ??? what can it be ??????????