I blew an engine fuse on my Miata and my Kenwood KDC-X859 went into the theft security mode when I reconnected it to power. After a lot of research and trial-n-error I was able to reset the code. I put the entire process and all of the useful links on my blog:
http://techbybucky.blogspot.com
-Bucky
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Kenwood. Sony is garbage.
Loose ground
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Personally Kenwood are better quality but sony are evn better
Press the reset button on your car CD player. For example my kenwood would have the reset button located on the facia front.
unplug it and plug it back in
For the best rated brands of car stereo speakers, Kenwood, Sony, Infinity, and Rockford Fosgate are among the highest rated. The prices are also reasonable.
Some popular car stereo brands include: Sony, Panasonic, Koss, Philips, JVC, Alphine, Audiovox, Bose, Clarion, Digital Designs, Hertz, JBL, and Kenwood.
The top car stereo brands are Kicker, Sundown Audio, Alpine, JL Audio, Digital Designs, Pioneer, Kenwood, MTX THUNDER, and Rockford Fosgate. The majority of people prefer these brands.
http://www.bipster.zapto.org/Fun_Stuff/How-To/KDC-MP8017/default.htm