Here's how I got the unit out. To get the face plate off of the AquaTronics housing I slipped a putty knife between the console and the bottom corner of the faceplate, then inserted the blade of my Kershaw knife between the putty knife and the faceplate and gently wiggled it until it popped off. No marks on the console!
Next I removed the four screws that held the plastic case + metal housing and disconnected all three wires harnesses (three plastic connectors). That allowed me to slip the case + housing and radio out of the console.
Next I inserted two thin shims between the metal housing and radio to lift the tabs that lock the radio in place. That should have freed the radio but it didn't. I had to slide the putty knife between the metal housing and the bottom of the radio. That cut what appeared to be some light adhesive between radio and housing and between radio and foam shock absorbing material.
Knowing about the adhesive, I could now take the radio out without removing the case and housing. However I recommend taking the entire case out to optimize snug install of the new unit, specifically to ensure there is a light bond between radio and the pad.
There are three wire harnesses for the radio. All have a male female connector inline:
1. A two wire harness for the antenna. I don't expect to be using that again.
2. A four wire harness. On the radio side the wires are red, yellow, blue, and black. According to the Dual Manual, Red is fused at one amp and connected to a console switch, Yellow is connected to the battery and is fused at 5 amps, Black is ground, Blue is the remote turn on for a power amp.
3. An eight wire harness. On the radio side there is a purple pair, white pair, green pair and grey pair. Per dual manual, White and Grey pairs are for "front speakers", Green and Purple for "rear speakers".
Now for questions based on the Clarion wiring instructions:
1. Any reason to not wire the Clarion red wire to the red wire in the four wire harness? Is leaving a 1 amp fuse in line ok?
2. Any reason to not wire the Clarion yellow wire to the yellow wire in the four wire harness? (both original unit and Clarion label this as memory power) Do I need a 15 amp fuse or will a smaller one do?
3. I'm not sure if mapping blue to blue white is ok, but is there any need to even connect them if all I'm after is high quality radio reception just using the Clarion unit plus existing installed speakers?
4. Any recommendations on antenna? What type of antenna connector Did you use with your Clarion?