I installed a new a/c system in my 2002 Audi TT 1.8L. The a/c system works great but the problem I am have is a 3 to 4 amp draw on battery when car is off. I have pulled the negative terminal on battery and connected a multimeter to verify amp draw. Is there a relay that might be stuck or a electrical short in my system? Any help would be appreciated. Thanks Vinny