You can buy the cheapo switch off amazon that I linked in that thread and plug it in to see if that fixes it. Two things about that switch, though:
1. It does not accommodate the backup camera, and I'm guessing you have one. So if you use it, you'll have to splice wires or otherwise integrate the backup camera portion of your existing harness. But this probably should not matter because...
2. I would not recommend the cheapo amazon unit as a permanent solution because, surprise surprise, the cheapo wiring harness is really cheap. The liftgate actuator felt really fragile and like it would break apart within a year.
So, what you can use it for (and what I used it for) was to diagnose the problem. If you plug it in and the liftgate switch works all the time then the problem is either your switch or the wiring from the connectors to the switch.
1. It does not accommodate the backup camera, and I'm guessing you have one. So if you use it, you'll have to splice wires or otherwise integrate the backup camera portion of your existing harness. But this probably should not matter because...
2. I would not recommend the cheapo amazon unit as a permanent solution because, surprise surprise, the cheapo wiring harness is really cheap. The liftgate actuator felt really fragile and like it would break apart within a year.
So, what you can use it for (and what I used it for) was to diagnose the problem. If you plug it in and the liftgate switch works all the time then the problem is either your switch or the wiring from the connectors to the switch.