Ok I know the yellow wire has no power and it should be 12 volts all the time the problem is its not the fuse behind the radio it simply has no power where does it begin on a 2006 sea ray 185 sport?

SOURCE: clarion marine stereo M2455

Don't worry about the brown wires. They are for telephone mute.

The yellow is Memory (constant 12 volt, so battery is fine), but the red should go to a 12 volt source that turns on and off with the key.

SOURCE: Clarion DXZ785USB - Connecting Fused Lines

You will definitely need to connect the Yellow Wire Memory Back-Up Lead, since this is the connection from the radio to the battery that stores the time and your presets. If it is not hooked up, you can use the radio, but all your settings will return to default once you turn off the car. The Yellow Wire Bus Power Lead sounds like it would be for powering an auxiliary unit like a Sat Radio or HD Radio add-on. You will not need to connect this unless you have an add-on such as one of these.

SOURCE: Clarion M5675 won't turn on

Take the stereo all the way out and hook the black wire to the negative terminal and the yellow and the red wire to the positive terminal on a charged car battey. If it still does not turn on you may have fuse in the back of the deck. If not it's probably fried.

SOURCE: wiring confusion

yellow constant
red switch
black is ground
blue power antenna if any
dimmer i/illumination is optional

front- right-red/green-+
front-left-blue/green-+
rear-right-red/yellow-+
rear-left-blue/yellow-+

these are all the positive side wire for all your spkr

SOURCE: trying to install clarion drb2475 into my car I

the brown is a mute wire. i dont recomend hooking this wire up