'98 a3 aftermarket stereo HELP!!

mark barnes

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Oct 13, 2014
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Hi all my misses has got an a3 and im having trouble fitting a kenwood stereo.

Ive got the pc9-401 harness adapter have nothing from rear speakers and stereo turns on and off.
The HU has red n white connections which i think is the preouts for sub... does this mean i need the pc9-404 adapter
sorry for being thick with audis ;)