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Various Misc Electrical Issues after Radio Install HELP!

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I instaled a AVIC920BT using the harness kit several months ago. One issue that I had post installation was that the video bypass didnt work. Yesterday I removed the radio to fix the bypass. Everything looked successful, however last night I noticed that some odd switches no longer worked. Power Windows, Power Lock, Rear Defrost. I have checked row D in the fuse box and all looks good. I dont even see how these things can be related at all. Any help would be appreciated.


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Sorry forgot to mention:

2002 Boxster S

Factory Bose Speakers and Amp

I took the center console and dash completely apart tonight to inspect for any damage and I dont see any crimped or damaged wires. I did find one 4 wire harness at the bottom center of the dash not plugged in but I cant find anything it would plug into. I also cant find what that plug is used for in the Bently maintenance manual.

Thanks again for any help...

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The plug you found at "the bottom center of the dash" is most likely the plug for the optional telephone installation. It can be a source of switched and un-switched electrical power. If you search here on RennTech you will find more information.


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Have you had any other strange electrical issues prior to installation. ALmost sounds like a faulty ignition switch.

No strange electrical issues whatsover. The car starts and runs perfectly. The only thing that I have found so far is on a 1997 - 1999 Boxster shares a high amperage fuse (F3) that controls the Audio Option Pack, Power Windows, and Rear Window Defrost. These are the 3 things that I am having issues with but my car is a 2002.

Help please..

I don't want to have to take it to the 'Stealership'

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