Originally posted by Chris Matthews:
Well, then can you add another amp to the factory deck. I like the way the factory system looks, and I dont want to worry about theft
Good luck getting any sort of answer to this question. I have tried several times to get an answer to this, but the only suggestions I ever get are to upgrade my HU. I don't believe anyone has ever sucessfully done this. Personally, I tried, but I'm not sure what type of output the factory HU is giving. It's not a "normal" pre-amp out. When I was testing, I tripped my amp on the known correct wires several times. I also blew 2 factory speakers (no big loss

). So, unless anyone can give you accurate information on the wiring outputs on the factory HU, I don't recommend this configuration. I can, however, give you most of the wiring schematic if you need it. I just don't know what type of connection is between HU and amp. Hope this is useful.
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98.5 Tour SE Sport 2.5 ATX
Mobile 1
80W low /100 W high beam... in transit