Only tweeters are working..?

the blue/white goes to the blue/white wire on the gray connector. on gray connector,from left to right.#1 blue/white-amp turn on,#2 no use,#3 black-ground #4 no use,#5 orange-no use,#6 red-12 volt key on,#7 no use,#8 yellow-12 volt constant power.gray connector is power input from car /power output to front amp.then the front amp sends turn on power & audio sig to rear amps
 
Your problem is definetally because with the mach there are two additional amps in the rear. I forget what I did to fix it after I trashed the stock amps though.
I'm pretty sure I split the tweeter wiring and used a crossover to filter the frequencies.
 
davis3 said:
the blue/white goes to the blue/white wire on the gray connector. on gray connector,from left to right.#1 blue/white-amp turn on,#2 no use,#3 black-ground #4 no use,#5 orange-no use,#6 red-12 volt key on,#7 no use,#8 yellow-12 volt constant power.gray connector is power input from car /power output to front amp.then the front amp sends turn on power & audio sig to rear amps


Which grey connector has the blue/white? I tried the blue/red on my grey connector, as well as the blue/white on the black connector... neither worked. I'm going mad :mad:

I apprecite the help. Sorry my car is causing so much pain.
 
Ok, we know WHERE the problem is now... My stock head unit only plays the tweeters as well, so apparently some of the stock wiring is missing/fried/cut somewhere....

Suggestions on what to check... or do I need to take it to a professional who knows what they're doing..
 
did you disconnect the front amp?the gray connector i'm talking about is on the bottom,left on your picture.try restoring everything to when you started.rear amps will not work without front amp connected.front amp controls 2 front tweets and 2 rear tweets,rears control the 2 lower door and the 2 subs in rear speaker tray.the black connector on the bottom right of pic,i dont know what that is,there should be a 8 port square connector.that is where the speaker outputs from headunit connect to.all speaker lines run through the front amp.
 
davis3 said:
did you disconnect the front amp?the gray connector i'm talking about is on the bottom,left on your picture.try restoring everything to when you started.rear amps will not work without front amp connected.front amp controls 2 front tweets and 2 rear tweets,rears control the 2 lower door and the 2 subs in rear speaker tray.the black connector on the bottom right of pic,i dont know what that is,there should be a 8 port square connector.that is where the speaker outputs from headunit connect to.all speaker lines run through the front amp.


I reconnected it before trying, still nothing.


The blue and white wires you see on the grey connector are labeled as "power antenna" and they don't lead to anything.


I hightlighted the power antenna blue wires:

radiowires2ug3.webp
 

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alright man, you got way too many wires in there, heres what i did,
take out that entire harness and ditch the mach. if you begin to remove the wire harness you will find another set of the gray and black plugs. because you got them plugged into the mach 460's harness.
my stereo sounds 100x better then the mach systems, with just running all speakers off the headunits power. :SNSign: