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Old 04-26-2015, 04:41 PM   #1
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Stereo Wiring?

After rerouting the stereo wiring harness to the front overhead cabinet in our "74" Tradewind, I'm getting ready to hook up a new Alpine stereo radio. I have the speaker wiring all labeled and ready to hook up. I have two larger wires that I assume are the ground and power...one blue and one white. Is the blue power and the white ground? Thanks!

Bob "Roadrunner"
Indiana, PA

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Old 04-26-2015, 04:50 PM   #2
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Generally yes, but put a meter on it to be sure. Cheap digital meters are available for under $15 at Harbor Freight or Walmart. They have a built in + or - too.
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Old 04-27-2015, 05:04 PM   #3
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Connecting Accessory Wire

I was able to get a meter on the wiring in question. Blue is hot and white is ground. Connecting the Sony Car Stereo should be straight forward: blue to yellow (radio) and white to black (radio). The head unit also has an accessory wire. I'm concerned about battery drain. Should the accessory wire be spliced into the power wire? Should I put a cut off rocker switch inline to the accessory wire? Has anyone addressed this issue? Thanks!

Bob "Roadrunner"
Indiana, PA

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Old 04-30-2015, 12:31 AM   #4
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1974 Argosy 20
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The true "accessory" wire on a car radio usually is for a power antenna on a car, or an external amplifier.

Now, if you have a two input radio, meaning there are two hot wires going to the radio head, one will keep the electronics going (keeping stations pre set etc) and the other will power the radio proper. Your wire for "accessory" you mention may mean it goes to the Accessory position on the car, that is switched on and off with the ignition.

So, not sure what to advise here, is it an accessory to the radio, like a power antenna or does it mean feed from the accessory position on the car. You may need to read the instructions with care to know which one you have.

When putting a car radio in an RV, it is easy to wire it in a way it will always be draining the battery when not in use. I always put a positive on/off switch in series with all power feed lines to the radio. You may lose the station pre set and clock when it is turned off, but your RV battery will not be killed over time. That is a good trade off in my opinion.
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Old 05-01-2015, 06:03 AM   #5
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See Blog for More Information

Well I finally finished wiring/installation of the new stereo in our kids trailer. Pictures and wiring information can be found in "Wiring New Stereo" blog:

http://www.airforums.com/forums/blog...w-stereo-2403/

Great to have your tunes with you...

Bob "Roadrunner"
Indiana, PA

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