speakers work then dont work - Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum



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  #1  
Old 04-13-2010, 10:59 AM
Alpinestars96 Alpinestars96 is offline
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2002 Chevy TrailBlazer LS
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speakers work then dont work

I read a thread about water being in the doors sos the speakers stop working. Mine just stopped working then started working again then can fade from left working to right just working. Took door panels off, no water in doors but some rust on rear speaker that never worked. How do you solve this problem? THanks
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  #2  
Old 04-13-2010, 12:47 PM
CoachEJK CoachEJK is offline
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2006 Isuzu Ascender
Midnight Blue Metallic 4.2L I6 2WD
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Intermittant speakers

3 potential problems to check out:
1. Is the speaker shot? Turn off the radio. Remover the door panel. Unplug the suspect speaker (you may have to remove it to do this). Many times the connectors at the speakers get a coating of corrosion from the moisture in the door panels. Just unplugging the speakers and plugging them back in a couple of times may solve your problem. Try this before you go to the next step.
Run a jumper from the speaker connection in the door to a test speaker. Caution: don't short the wires together. You can use just about any old speaker as a test speaker, 4 ohm to 16 ohm. Turn the radio on. If the test speaker works, then your problem is a blown speaker. Alternately, you could remove the suspect speaker and hook it up to your home stereo using jumpers to test it. If it works in your home system, then the problem is not with the speaker.
2. If the suspect speaker is good, then it is not getting a signal from the radio. Either a connection/wiring is bad; or the radio is faulty. To trouble shoot wiring and connections you'll need a multi-meter (VOM Meter). Disconnect the radio as described in this forum. If you know the speaker is good, plug it back in. Locate the appropriate "+" and "-" wire connector from the back of the radio. Run an ohm test between the "+" and "-" connections. For example, the color codes for the radio wiring for a 2006 Envoy is as follows:
Radio 12v orange + radio harness
Radio Ground black - radio harness
Radio Ignition (Class 2 Serial Data)
Radio Illumination gray (dimmer) + radio harness
Factory Amp Turn-on pink + radio harness or amplifier
Power Antenna N/A
LF Speaker +/- tan - gray +,- radio harness
RF Speaker +/- lt. green - dk. green +,- radio harness
LR Speaker +/- brown - yellow +,- radio harness
RR Speaker +/- dk. blue - lt. blue +,- radio harness

If you want to trace the RR speaker connect your ohm meter betwen the dk. blue and lt. blue connector from the back of the radio, You should get a reading close to "0" (actually it will be somewhere near 4 to 16 ohms depending on your speaker). If you get infinity then the signal is not getting through. You will then need to check each wire individually (between the speaker and radio) to determine which wire/connection is bad.

3. If the speaker is good, and the wiring/connections are good, the problem is with the radio. But before you replace the radio, plug and unplug the radio a couple of times. Sometimes the problem is the connection right at the back of the radio. Just unplugging it and plugging it back in may clean the corrosion off the contacts so it will work again.
CoachEJK
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  #3  
Old 04-13-2010, 03:25 PM
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GavinVoy GavinVoy is offline
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Old 04-16-2010, 03:10 PM
Alpinestars96 Alpinestars96 is offline
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Thanks for the write up. The speakers do indeed work. They just quit working alot! when i pull the panels off the doors they decided to work, then after a day they go on then off. I think It's in the harness plug that goes into the speakers. I'm gonna just break the plug get the wire out then wrap it right on the speakers and electrical tape it up just like i did in my 87 taurus. I dont want to do this to my 02 tb but it leaves me no choice! lol if that doesnt work well then im gonna tap in to the speaker with but the harness for the head unit. That should get err done!
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Old 04-17-2010, 12:35 PM
CoachEJK CoachEJK is offline
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Bet it is still the speakers

I'll bet the fault is in the speakers. If these are the original GM speakers they are semi-famous for intermitant failures. Both of my rears were intermitant so I replaced them both and solved the problem. Also replaced the fronts. Sounds much much better. I used Pyle PLG6.4 6.5-Inch 300 Watt Four-Way Speakers which ran $32/pr on Amazon after shipping. They fit without modification. Regardless, you'll most likely need to cut the plug off if you buy aftermarkets so doing this won't hurt anything. Solder the connections if you can. If you replace the speakers with aftermarket ones, I suggest you crimp connectors on the ends of the wires to plug into the speaker terminals.

Note on replacement speakers:
The best sounding are the Rockford-Fossgates followed by the Alpines, but for both, the tweeters stick out so far that they bow out the door panel (really should cut it out and install the aftermarket cover). More work than it's worth. The Component Fosgates and Alpines (tweeters/crossovers are mounted separately) are even better, but you need to mount the tweeters/crossovers run wires, etc. Too much work for what you end up with. The Pyles rate at 9.8 on TestFreaks.com. Hardto beat for the little effort it takes to install them.
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  #6  
Old 04-17-2010, 12:51 PM
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petevw petevw is offline
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Quote:
Originally Posted by Alpinestars96 View Post
I read a thread about water being in the doors sos the speakers stop working. Mine just stopped working then started working again then can fade from left working to right just working. Took door panels off, no water in doors but some rust on rear speaker that never worked. How do you solve this problem? THanks
I had the same problem....worked one day, not the next. I'm guessing 99% sure it's the speakers....replace them.
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  #7  
Old 04-17-2010, 03:59 PM
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djarmy2004 djarmy2004 is offline
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I have 2 sets of these in my truck and they sound amazing.
http://www.millionbuy.com/pows6c.html They were 90 shipped for 2 sets. As for the intermitent thing i always replace all the wires and speakers in all my vehicles so i dont have this problem but i suggest you do the same as you wont have that issue again. But if you dont just take the connector apart an solder the connections together then wrap with electrical tape and you should be just fine i think.
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  #8  
Old 04-18-2010, 01:33 AM
Alpinestars96 Alpinestars96 is offline
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Thanks for all th replies, it's just weird that they work then stop then work again, where can I got aftermarket ones that are a direct fit? I mean plug and mount the same as oem. Thanks
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  #9  
Old 04-18-2010, 02:13 PM
CoachEJK CoachEJK is offline
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2006 Isuzu Ascender
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Speakers

I'd look at Amazon. The Pyles I recommended are a direct fit except you still need to cut the wires and crimp on connectors.
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  #10  
Old 05-12-2010, 09:03 AM
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Starr167Trail Starr167Trail is offline
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Speaker working on and off UGG!

I have the same problem. when it rains my left speakers do not work on the left side of my Trailblazer. After a day or so of not raining (i guess they dry out) they start working again.

I remove the door panel and found water on the wires going to the left rear speaker. I looked in inside the door and I can see water dripping down from above (hinge side of the door). There is also a white pad directly behind the speaker that is very wet. So the big question is where is the water coming from and how to stop it?
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