My 2008 Sterling Chassis is experiencing fluttering or flickering head lights, dash lights, marker lights. Has any one dealt with this issue? This is what Im experiencing when it starts to happen. All lights will be fine and the I will notice the headlights(or dash or marker lights) start to flicker, at that time my voltage guage will start to drop from normal to just below 14 volts. I have found that when I turn the blower motor on high, the voltage will go back to normal and all lights will also go back to normal. I have checked grounds under hood, cleaned battery connections and tested batteries. After cleaning batteries the issue appaired to worsen just a bit. Through my research I have found it to many possible causes such as alternator,TIPM, Headlight switch, grounds and connections at TIPM. This issue is completley separate from the normal headlight dim/heater grid cycle.