'01 catera radiator yellow warning light on (I already put in 50/50 anti coolant to max), after change radiator reservoir same (with used one). before buying a new one, I heard of "jumping" by putting a metal clip around the two metal connectors in the plug, if I do that, and the light goes off, then I know is another bad sensor on radiator. But, if "jumping" the plug and the light is STILL on (I hope not) what does that mean??? Please help.