I plugged mine directly in the OBD2 with the jumper on and i had to manually turn it on and it would turn off when i turned the car off but it wouldnt turn on again if i started the car (the annunciators flash)
I tried running the power wire to the PGM fuse (kept the jumper on with the wire wrapped arround the 2 connectors) and as soon as i plugged my OBD2 my A pillar gauges and my radio would turn on without even having the key in the ignition...