I don't know what the problem is; but I will tell you my experience and what I've learned and that might help you.
IOD=Ignition Off Draw, i.e. its the power source for everything in the vehicle that needs constant voltage to keep its stored memory alive or operate while the vehicle is off, to include the always on source for the radio to keep its presets stored.
The IOD fuse under the hood, is incorrectly labeled by the fuse box lid, stating it is a spare. It is NOT a spare, it is the IOD fuses, and it is even more confusing becuase the IOD and AirBag fuses have funky plastic handles on them to make the easy to pull out. That is because there are many maintenance/repair procedures that require you to pull those fuses before starting work, thus a plastic handle to make it easier. If you didn't know that, you'd think the funky handle is just a conveineint holder for the spare fuses that Chrysler provided you. When I had fuses blow, I pulled the IOD fuses thinking they were spares; soon as I did that, my aftermarket pioneer radio stopped working, totally dead. I also got a message in the EVIC stating "IOD Fuse Out".
When I got new fuses and replaced the IOD fuse, things still didn't work completly right, went back and realized the funky handles for those fuses, made it difficult to fully seat the fuses, press it down harder and found the fuses moved in another 3/8" until they fully seated and everything went back to working like normal.
The best I can tell, since the Commander and a lot of newer cars have this feature where the radio continues to run after you remove the key, until you open the door or till you reach a certain time limit you can set in the vehicle options; to do this, they have changed the scheme of powering the radio.
In the past, you had the main power to the radio switched on and off by a 12VDC ignition switched source, then you had a small low power wire that was always on 12VDC to power the radio memory and keep your presets, etc. This scheme, the radio will always die when you remove the key because its power source is switched off, so this will never work if want the radio to continue to run after removing the key.
So, the Commander and other newer cars swap the 12VDC power wires, the always on 12VDC wire is much bigger and supplies the main power to run the radio, the 12VDC ignition switched wire is much smaller and all it does is tell the radio to turn on when the wire engergizes, the CAN bus tells the radio to turn off and it does when it sees a door open or the timer counts down to the time that was set in the vehicle options.
I do NOT know this for a fact, it just appears that way looking at the wires and envisioning how this would work.
I connected all my wires for my Pioneer AVH-8500 and RP4-CH11 according to the instructions and it worked just fine. I got what you got, a totally dead radio, when I pulled that IOD fuse, and it went back to working just fine when I finally seated the new fuse properly in the IOD slot.
So, if you haven't checked that IOD fuse, I would do that.
If that don't work, I would check if you have the always on 12VDC wire connected correctly. The radio will NOT run without the power from that wire, I suspect if that wire is NOT connected properly and providing power to the radio, the 12VDC ignition switch source would blow its fuse -OR- the new radio is smart enough to know which scheme it is wired into and change to newer power scheme, i.e. the ignition switch source is just a signal to turn on, draw all the power off the always on source, and if there is NOT power available from the always on source, it can't turn on.
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