I will try to help you diagnose this problem (I'm an electrical engineer).
If I heard you correctly that your radio continues to put out sound, but the display of the radio flickers with the intermittent power outage, then I'm suspecting an intermittent problem associated with your Body Control Module (BCM) and/or the CCD bus. The BCM controls many of your interior lights ... the CCD bus relays information from the PCM to the instrument panel and other displays such as your radio and overhead console. But, let me begin with a few questions to see if we can focus in on the problem.
Let's start with trying to figure out if it is the BCM or the CCD.
(1) The lamp driver (pin 16, orange) off your BCM controls all those small lights that illuminate your dashboard, and I believe it may also control the power to the radio display and the overhead console display. You may have to evaluate at night, but are all of these little lights flickering on and off? If so, then we will focus on your BCM ... if not, the problem may be with your CCD bus. (given the symptoms you showed, my bet is that you have a CCD problem).
If the BCM is suspected.
(2) Taking it one step further, the BCM also controls higher powered lights through a relay. Are the dome lights at your overhead console and the glove box light also intermittent? If they stay on, then our problem is on line 16 of the BCM. If they are also intermittent, then the entire BCM is powering off and resetting (which is, at a minimum, what I suspect if the BCM is the problem).
(3) Will your rear wiper work when the power is off to your dash? If it is still working, then we have isolated the problem to your BCM. If the wiper is also intermittent, then the problem is in the 50A circuit feed from your Power Distribution Center.
If the CCD is suspected.
(2) Put an OBDII scanner on the Data Link Connector below the steering column and see if there are any codes. Are there any?
(3) Many advanced OBDII scanners have the ability to monitor engine parameters in real time. If so equipped, set it up to monitor something like RPM, and then see if the scanner will stay connected during an outage. If it stays connected, then we know the CCD signal is successfully making it out of the PCM and we will need to try to find an intermittent problem in your wiring. If it is not staying connected, and the signal is dropping out, then the CCD signal is probably failing at the PCM or its connectors.
(4) Have someone tap on the connectors of the PCM, even wiggling them to see if that influences the behavior. If it does, your problem is at the PCM and its connectors, and you should do repairs following ZeeJay's guidance in item #1 of this thread: http://www.jeepforum.com/forum/f13/1...talls-1407423/
(5) If the CCD problem is not with the PCM, perhaps there is a short or other malfunction with one of the connected elements.
- Do you have a Vehicle Information Center (a digital display below your heating and air conditioning controls)? If you do, disconnect it and see if this solves your problems ...
- These are the other items on the CCD bus: radio, instrument cluster, automatic temperature control module (if equipped), overhead console (if equipped), body control module, airbag module, driver door module, passenger door module, memory seat module (if equipped).