Hello I have a 97 ford f150 4.6 larait, four wheel drive, well my truck has been acting up, first the drivers side electroinc window does not go up or down, but then one day it was working again,now its not, then my air bag light is on and flashes,and my four wheel does not work now, also my heater fan was acting up I turned the truck off, key pulled from ingition and that was still running, I have been doing reserch and found it may be the GEM module, anyone else have these problems??,and what was the cause, please help.