I'm hoping someone might have some suggestions on this. I'm trying to diagnose and repair my rear defroster. When I press the switch it lights up and I can hear the clicking within the switch, I can also hear the relay clicking under the glove box but the switch will not stay on (only stays on as long as I keep the switch pressed in). The front windshield defroster works just fine. I've swapped out the rear defroster switch and relay to make sure there are no issues with them and I still get the same outcome, the switch lights up, clicks but only stays lit as long as I keep the button pushed in.