2007 Chevy Silverado Front Door Main Speakers

Hi, I have a problem with the front door main speakers on a 2007 Chevy Silverado Classic extended cab. A few years ago I replaced them with a set of Infinity's, they have worked great till now, the main speakers have quit working, there is sound getting to the doors as the separate tweeters still work fine. I have tested the main speakers and they still work,(using a small portable radio as an audio source) what I see on some troubleshooting sites is that there may be a set of fuses for the front door main speakers, I have looked everywhere for these fuses,(if they exist)and found nothing. What I need is an exact wiring schematic for the radio and speaker connections for this truck, it does not have the Bose upgrade, nor the external amp, this way I can do a point to point wire check to see if I have a problem with the main speaker wiring. Thanks for any help.

http://www.bbbind.com/free-tsb/ http://www.revbase.com/BBBMotor/Wd/DownloadPdf?id=137626My ex once told me I have a perfect face for radio.

Cool, thanks a lot, it will save me several hours of troubleshooting. More info, the rear speakers at the radio output(disconnected from radio) show 4 ohms on each L/R, the fronts show 8 ohms, this tells me that somewhere the front main speakers are not connected in the circuit, two 8 ohm speakers (one main one tweeter) tied in parallel will give you a 4 ohm reading. So with this schematic I can try find the problem, if a bad wire I will by-pass with new.

There is a capacitor in line with the tweeter. You should not be able to see the tweeter via an ohm meter. Look for a bad connection where the infinity wires are connected to the truck wiring.