This makes sense to me. My 5pin relay setup did not work, I tried multiple times.
So I pulled the ground wire and the pbrake wire from the relay. Then loaded the DVD, then tried touching the wires together, releasing, then together again... worked perfect!
So I setup a switch with those two wires, and it works great.
Switch is really simple answer that shouldn't ever stop working (as some firmware upgrades have made relays not work for other models, e.g. Appradio).
Get a 3 prong switch. Hookup the parking break wire to the lead. The ground to either of the other prongs (the pron