Sure, it can be done. How involved are you willing to get doing it? It involves changing wires at the BIU and defogger switch and I think changing the switch itself to a mechanical latching one (not sure on this.)
If you leave it on once it will kill it dead.Hi, when I remote start my WRX 2015 on winter , the Rear window defroster is never activated , can I put a switch or bypass something to put the Rear window defroster always on when I want?
There is a reason it's on a timer and only runs so long.Not according to the electrical schematic - it is only powered with switch in start or on.