Aftermarket head unit fitting problem

duvetdo

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Dec 24, 2009
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Hi guys.

First post, so please treat me gently!

I think I've bought all the right kit to fit my Alpine CDA-9855 into my A4; the facia panel, PC5-90 aerial adaptor and PC9-408 harness (I have the fully-amped Bose).

I whip out the old Concert II, clip all the connectors together and..... nothing. :mad:

Your help will be much appreciated!

Thanks.