04 mach stereo, side / rear speaker fail

[superdavetfft]

Hi;

I've got an 04 with a mach system and it's side and rear speakers aren't putting anything out. Tweeters all ok.

I checked the two amps in the truck, they 'look' ok, fuses test ok. Question is what could cause both stereo sides to go out at the same time? Is there a common power lead to the amps that may have disconnected?

What should I check next?

thanks in advance!

superdave

 

[superdavetfft]

Additional

it's a mach 1000 btw

 

[2BADSTANGS]

Start by checking incoming power to the amps, then check the remote turn on lead. You may have lost one or the other.

 

[superdavetfft]

schematic?

correction it's a 460 after all...

I checked every lead heading to the two rear amps and no voltage was present on any lead. Where does the power come in at to the amps? I couldn't tell for certain as the wiring didn't match the schematic I had found for the 460 & 1000 series stereos. Is there a good diagram out there someplace for the 460 in an 2004 model year?

thanks!
superdave