Ok heres the whole 411.....

I got an aftermarket head unit thinking that it would be nice to have welp bad idea cuz now for some odd ass reason my two speakers on my driver and passenger side doors dont work anymore and my tweeters work but the speakers dont. on top of that my factory amp which powers the mach 460 dont work in the back. cuz before i got an aftermarket unit and i put subs in there my amps worked for the 460 now it dont. the service tech at best buy told me that he tried everything and he couldnt get it. then i went there with a buddy of mine and i was makin conversation and ended up talkin about the mach 460 and he told me to pull the deck out and hook up the amp but i tried it and no dice. so if anyones had this problem or any know how id awefully appreciate it thanks guys.

I really really really wish that we could make a sticky to address this problem as we have had one or two people a week asking about it. I have requested admin priv so that I could make a couple of sticky's(since the mods never look in here) so that it could be asked even before it was asked......

Take your deck out and connect the blue and white amp turn on wire on the factory hrns, to the remote turn on wire on the deck(normally blue/white or blue).

Your tweets are now playing full range and I would recommend using some caps as high pass cross overs. 100 microfarads at radio shack are a buck or two each and will save your tweets.