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1.3 ohms should be taxing it too much, 1 ohm is in spec. I've been running two of the PBR500x1 at one ohm for a year. They bench tested at 586 and 587 watts. No problems at all with the Jeep on or off. Have you had any battery related problems? You may have gotten a bad one. Hopefully it won't take long to get back.

 

I've checked all the wiring and honestly the output coming from the factory sup wires are distorted as all hell. I got to 15 on the volume and sound was clipping bad.... witch can due damage to your amp and sub

 

It is clipping before the amp or after? If before it's a prob with the factory amp, if it's after your amp then try turning your gains down or does you LoC have gains that can be adjusted?

 

it worked fine for 6 months. quality of the sound / signal 'sounded' fine to me. battery should have been new in 2012.

 

No the adapter won't effect sound quality, I'm concerned with the CanBus interface. The CanBus controls every function within your jeep and is a major Pita when adding aftermarket accessories, stereos, lights, etc. You describe warning light coming on, windshield wipers turning on, all controlled by the CanBus. If the stereo has an adapter that doesn't communicate well with the CanBus, it can cause all kinds of
Problems, error lights and strange things turning on and off. The other culprit is often bad grounding points but you said you double checked all of those.

 

the amp turns on/off with the high level inputs - no wiring to the canbus required... when I turn on the vehicle, the amp lights up, and when I turn off the vehicle turns off.

turning the headunit on/off doesn't seem to turn the amp on/off. My guess is even 'off' there is still a slight signal going to the speakers.

I'll re-check my ground this weekend...