The low coolant light comes on often in my 2001 grand cherokee 4.0. The radiator is full, the recovery bottle is full. The temp is good. I pulled the connector from the float, jumped the wires in the connector, and removed the float manualy controling it. The warning is still on. Could this be a problem with the ECM? can it be reset? I prefer not to have to hit the reset button every few minutes as I drive.