Problem w/Mach Radio
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Joined: Dec 2002
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Problem w/Mach Radio
I have a '97 Expedition w/a Mach System. Recently, as I was driving the music stopped coming out of the speakers. A humming sound began at the rear where the subwoofer is. I plugged the headphones in and the radio,cd, & tape player are still working - but, the music is not coming through the main speakers. Would anyone know what may be the cause of this problem.
Thx,
Thx,
Junior User
Joined: Aug 2001
Posts: 67
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Problem w/Mach Radio
MJ-
I would look for a short in one of your speaker wires. The Ford radios do some sort of load check on the system to make sure there is not a short in the line. If the radio does not see the resistance it expects, it doesn't power up the amp. Everything else works fine, including the headphones, radio tuner, etc, but you just don't get any sound.
If I remember right, you can isolate the offending speaker (or speaker wire) by adjusting the fade and balance controls to only have one speaker going at a time. You have to shut the radio off between changes and let it reboot, but I would think it would start up fine for three of the speakers. I want to clarify that I am not sure if you can do this or not, but I think I was able to do it when I installed my aftermarket amplifier.
Jerm
I would look for a short in one of your speaker wires. The Ford radios do some sort of load check on the system to make sure there is not a short in the line. If the radio does not see the resistance it expects, it doesn't power up the amp. Everything else works fine, including the headphones, radio tuner, etc, but you just don't get any sound.
If I remember right, you can isolate the offending speaker (or speaker wire) by adjusting the fade and balance controls to only have one speaker going at a time. You have to shut the radio off between changes and let it reboot, but I would think it would start up fine for three of the speakers. I want to clarify that I am not sure if you can do this or not, but I think I was able to do it when I installed my aftermarket amplifier.
Jerm
