Cossie Merc

Hi to all I have recently bought a 2000 X plate 2.3 Galaxy Ghia for the misus to run about in however I have already started having issues so I would appreciate some help on the following Wipers stopped working the other week and have since worked and been OK??? The most annoying issue is when I brake the front off side side lamp (Headlight) illuminates eveytime. the brake lights are working fine??? Please please any ideas???? Regards Simon