Mach 4 audio subwoofer inop, sub woofer NOT blown

[Ristin]

Just got a sweet 2000 Expy EB with 118,000 miles on it. In really good shape but the subwoofer doesn't work. I read that the common issue was a blown speaker so I ordered a new speaker and tore the truck apart. Discovered the speaker is fine. I hooked the sub speaker to another system and it plays fine. Just to be sure I took another known good speaker and connected to the subwoofer output and nothing. Got dark so I haven't gone any farther. Today I'll check for blown fuses but beyond that, I don't know.
Any suggestions?

Thanks

 

[goaliekeg]

It sounds like your amp might be bad. I'm not familiar with the wiring layout in the 2000 Expy, but I would check that. If you can find a fusebox diagram that will be able to tell you if there is a fuse dedicated to the subwoofer, check there. Logic tells me that there is one fuse for the audio system, so if that was blown, none of your audio would work.

 

[Ristin]

found it

So i checked the plug and all is good to the amp. Took the amp apart and....

Parts are available from China in 30-45 days....

 

[Mediamonkey11]

I have a replacement amp/sub assembly if you're interested... Came out of my '00 and worked flawlessly upon removal.

 

[Ristin]

Thanks Tony. I ordered the transistors today. If that doesn't work I'll shoot you a PM.

 

[GAINMOB]

Also check amp...

 

[Mediamonkey11]

Lol he did its a fried transistor


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[Ristin]

Thanks to Tony I have bass in my Expy!

USPS tracking shows my parts for the amp landed in San Francisco today from China. I'll try to fix the amp and either have a spare or throw the subwoofer in my Scout. Might be nice to have bass in the Scout. Shake some of the rust off.

 

[hammerg26]

How hard was it to get to the speaker? I think mine is blown - darn rattles.

 

[GAINMOB]

How hard was it to get to the speaker? I think mine is blown - darn rattles.

remove 2nd row seat belt...3rd row seat belt...and the bottom point bolt for the 3rd row seat belt...you will need start sockets...T50-something...remove lift gate top and bottom panels...remove window panels and lastly pull main panel from side and out...cargo area needs to be folded flat