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ALL WIRES ARE HOOKED UP TO MY BOSS 637UA. I AM INSTALLING ON A BOAT HOWEVER CANNOT GET IT TO TURN ON. THERE IS POWER TO RADIO

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Hogar - No sound from Boss Radio after initial installation test.


If you are hooked up to the factory wiring harness i would think there may be a factory amplifier that is not getting power or is bad.

Test the stereo by hooking a speaker up to the speaker out wires from head unit. if it has sound try to find out if there is a factory amplifier.

Good Luck

May 24, 2016 | Cars & Trucks

1 Answer

What am i doin wrong with my boss radio? when i set a station when i shut the engine off i loss my settings


Sounds like your Memory +12V wire is not connected properly. If this wire does not have a constant source of power then you will lose all of your settings on your radio.

Things that may cause you to lose power through the Memory 12V wire:
  • Not hooked up properly to the battery
  • Bad battery
  • Bad ground
  • Loose wires



Boss 637UA manual

Sep 04, 2014 | BOSS AUDIO SYSTEMS BOSS 637UA - radio / CD...

1 Answer

No power to unit?


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Here is the wiring diagram make sure you have a good earth.
Red to 12 v IGNITION and yellow to constant battery power. Hope this helps

Jun 07, 2013 | BOSS AUDIO SYSTEMS 612ua

1 Answer

No sound coming out of my boss 637 u cd player


Same thing here, only hear subwoofer no treble at all...

Feb 11, 2013 | Newegg New Boss 637ua 240w Detachable Face...

1 Answer

Radio in our boat wont turn off


It was the clock requiring setting!!!

Dec 20, 2009 | Panasonic Car Audio & Video

1 Answer

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.

Jun 16, 2009 | Clarion Boating

1 Answer

What color is what on the clip coming out of the bak of the deck.(power,ground, left/right front spkrs, etc?


Good Day,

Good Day,

Red is ignition
Yellow is constant hot (you can wire red and yellow together if you don't have a constant however the radio will loose settings each time the boat is turned off)
Black is ground
Gray wires are front right
White wires are front left
Green wires are rear right
Purple wires are rear left
Blue is power Ant
Orange is ilumm

Hope this helps

Jul 07, 2008 | Sony CDX-CA850X CD Player

1 Answer

Installing CDM-7836 into a Boat


Yes I can help, the blue/white wire isn't meant for that purpose. That wire is meant for an amplifier turn-on. the wire you want to use is the red that is the accessory lead. What I would recommend is finding a constant 12V to hook to the Yellow and hook the switch 12V to the red. This way your radio will retain memory. Or you can connect both the red and yellow to that switch and never turn the switch off. Simply use the on/off button on the radio. Good Luck I hope I could help.
-Andrew Hawkins

Jun 18, 2008 | Alpine CDM-7834

2 Answers

Installing a car stereo


you must connect the wire to turn on the amp

Apr 03, 2008 | Durabrand WD268 Cassette Player

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