JBL Subwoofer Stopped working

66_Fairlane_289

Registered User
Today my subwoofer was working fine then all of a sudden it now makes no noise or anything, almost like its not getting any signal. There is an intermittent crackle but other than that its just dead. Any ideas on what the problem could be?
 
Today my subwoofer was working fine then all of a sudden it now makes no noise or anything, almost like its not getting any signal. There is an intermittent crackle but other than that its just dead. Any ideas on what the problem could be?

Following as well. My front speakers only work when the radio is up almost all the way. Are they blown maybe? And I think my sub is barely working if that
 
It's been a while since I've seen the stock sub as I pulled it a while ago. If you suspect the speaker is "blown" all you need to do is take a C cell battery and touch the positive end to one speaker terminal and the negative to another. If you match polarity the speaker will move outward. If you reverse the polarity it will move inward. It should make a decent thud noise. If your sub does this the voice coil is not blown. Personally I'd suspect the amplifier unit. You can pull the two pin connector behind the amplifier and measure 12V there. Can't remember if its always hot so probably best to turn on the radio when testing. Nice thing is the pins are inside the connector and shouldn't short on the body of the car if you do turn on the radio with it unplugged. You can also go grab an amp bypass harness for back there, install it to jumper past the amp and see if you get any sound at all...
 
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