have a 325IS well the climate control is acting crazy while the car is running with the lights on the the climate control will work the a/c button defrost etc. but once I cut the lights off the the unit stops working samething while driving but it will work for a while then shut off with or without the lights on. Now suggestions my machanic says it might be the harness because the climate control unit was replaced with a new one and both done the samething has anyone ever had his problem? Also with effect the heat? could it be the harness?