2006 Cobalt 2.2 radiator fan doesn't come on. Any help diagnosing would be appreciated.
Radiator fan will not start automatically even when temperature is above 200F. The temp. sensor displays the correct temp. and if disconnected it displays -48F and the fan runs. Fan relay is good. Can run fan from either relay. Freon is bleed from AC so can force it to start by turning on AC. It tests as if the #2 relay has an open ground on the coil side. Can't get access on #I relay to check it.