Audio Systems: 2001 dodge caravan. no sound on front speakers, infinity sound, dodge caravan

Question
Hi! i just install an aftermaket stereo and noticed that front speakers doesn't work. i read one of your previous post in a similar problem problem  I'm trying to find the amp wire using the power antenna from aftermarket wire connecting to all the wires one at the time but i couldn't find it do you know if this wire is together with the wire harness or the wire is separate? because i have one white wire with purple stripe with a plastic connector white with a red tip. also i saw another wire color orange with yellow stripe this one has no connection with any of the wires that came out from the new stereo.i have used a metra harness kit to installed it. please i need your help to identify an power my amp. thank you so much .

Answer
IT IS white  and in the same radio harnes, use the  blue wire from the new radio you also need this interface if not you are going to burn the infinity sound system and the  new radio
because the factory radio is 1 w rms x 4 and the new radio output is 35 to 45watts
to much power to the factory amplifiers

http://www.oemautosound.com/pc-598-148-oem-interface-differential-converters-uni...