I have an old M455 Clarion with 2 wired remotes. Now I am not getting any power to radio, remote units or amp. I checked power all the way to radio and its good. Is there a fuse on back of radio I did not know about? All fuses on boat are ok. Help solution is to buy new radio and remotes. To expensive!

SOURCE: Sea ray boat Clarion stereo and amp

Unless a fuse is blown, there's a problem with the wiring or you have a defective component, there's no reason the amp shouldn't come on. You need to confirn that you have the proper voltage at the amp.

With your multimeter set to DC volts, the black meter lead on the ground terminal of the amp (not on the point where the ground wire connected to the vehicle) and the head unit on (so the amp will have remote voltage applied), touch the red lead alternately to the B+ and remote terminals of the amp. If the voltage is below ~11 volts, you need to check the wiring feeding whichever line is too low.

SOURCE: NO SOUND FROM CLARION XMD3

I have a XMD3 with Sirius on a Larson boat. Had same problem - everything seemed to be fine on unit (everything lit up and CD showed different tracks and time changing), but no sound. I suspected a ground problem and checked wires I could see. Found one speaker wire that had been frayed due to faulty installation. As soon as I wiggled that wire I got sound on all speakers. Not sure why one faulty speaker would kill all sound, but it did for me.

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: Amp doesn't come on

Hello rheabarb,

You did not say whether or not you checked the wiring going to your subs. Many times, a shorted or grounded speaker wire will cause an amp to fail. And if the amp powers up OK with the subs disconnected, I'd suspect one or more of the wires.

Hope this helps.

SOURCE: radio works on tech bench, not in the boat

Yes, the yellow wire is the switched hot lead - it is typically connected in one way or another to the ignition switch. There is also a smaller gauge red wire that is connected directly to the battery (through a fuse of course). Both of these wires have to have power for the radio to work. Also the black wire has to be connected to a good ground. If all three of these wires are confirmed to be in good order (power where there should be power, ground where there should be ground and no shorts) the radio should at least power up when they are all hooked up and the ignition is on.