Ok guys, I got everything working tonight. I updated to v1.5 firmware and the parking mode still wasn't working so I then just switched the wires since they both use a 10amp fuse. Interestingly, the camera wouldn't update using a 64gb Samsung endurance card since it won't format to FAT32. It used some sort of weird default to the effect of xxxFAT. I used a regular 32gb Samsung evo card which I was able to format to FAT32 and it worked instantly. I then switched back to the 64gb endurance card and it seems to be working well again. Parking mode is now working!!
On a side note, from what I've read it's better to use time lapse in parking mode rather than event recording since the a129 does not have buffered parking mode. In reality, I would only be catching the tail end of the event since recording only starts after the impact is detected. Am I thinking about this right?