I hope so. Getting into yoga positions under the dash again is not very tempting. I was there when getting my ABS working.
There are two defroster relays. Defroster relay and rear defroster relay. I assume we are talking about the rear? What do each of them do?

 

Front defrost relay supplies full power to the heater/defrost blower motor when the slider on the head unit in the console is in the full-right 'defrost' position. Rear defroster relay supplies power to the heated rear window. It has a timer that is triggered by the dash button but powered through the ignition switch. Pull the rear defrost relay and try again.

 

It was the rear defrost relay. Thank you Mrmerlin.