Ford Mustang Forum - View Single Post - battery disconnect for weeks?
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post #9 of (permalink) Old 12-26-2015
Dana W
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Joined: Jul 2009
Location: Oviedo FLA
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You may not have a code. Some MFG's don't do them any more. This was a big thing starting in the late '90's. It is probably a moot point these days.

The code is/was an anti theft measure. In our old Suburban, and our two old Volvo's, if the radio received no power for a certain length of time, usually less than 1 hour, one had to enter a 4 digit numerical code. Most people never remembered to change it, so it was almost always still four zeros. If the radio needed a code, it would say Enter Code when powered back up, and refuse to work until you gave it the correct one.

Forget I mentioned it. Now the stereo head is probably matched to your computer, and will only work in your car.

I think a lot of the after market stereo's still use a security code though.


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