damn thing keeps coming on, though it's full. i work for ford and know it's common. i am trying to sell the caar to buy a svt focus, and want to get rid of the light without replacing the bottle. i assume if i just unplug it, that will take care of it? problem is the rear bolt that holds it in is rusted to the nut, and the hw unit just spins, so i can't lift the bottle up to unplug it. can i just snip the 2 wires and that would take care of it too?