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'96 chevy tahoe stereo problem short?


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sisko 
Member - Posts: 3
Member spacespace
Joined: May 05, 2010
Location: California, United States
Posted: May 05, 2010 at 1:26 PM / IP Logged  

My '96 Chevy Tahoe has a stock sterio in it.  About 3 days ago the radio would suddenly fade out then explode to extremely high volume.  I will power it off then back on at which time the speakers don't work.  Now the speakers only work on a random basis.  Is this a short?  Any suggestions on where to start troubleshooting?  Thanks.

sparkie 
Platinum - Posts: 2,061
Platinum spacespace
Joined: November 06, 2003
Location: Canada
Posted: May 05, 2010 at 3:49 PM / IP Logged  
Use a volt meter to measure the voltage of each speaker wire at the radio. Each wire should measure about 6 volts DC. If you find one lower or higher, then you need to trace that circuit for a short to ground or 12 volts. If you have rear door speakers, then there is a separate amp for them under the driver's side dash.
sparky
i am an idiot 
Platinum - Posts: 13,693
Platinum spaceThis member consistently provides reliable informationspace
Joined: September 21, 2006
Location: Louisiana, United States
Posted: May 05, 2010 at 6:40 PM / IP Logged  
Does your radio have a knob around the outside of the volume knob with SCV written on it?   The SCV is not written on the knob, but silk screened around the outside of the knob.  On the face of the radio.
sisko 
Member - Posts: 3
Member spacespace
Joined: May 05, 2010
Location: California, United States
Posted: May 05, 2010 at 9:23 PM / IP Logged  

Yes.. it sure does have the SCV.  I purchased this SUV about 10 days ago and have yet to figure out what it does. 

i am an idiot 
Platinum - Posts: 13,693
Platinum spaceThis member consistently provides reliable informationspace
Joined: September 21, 2006
Location: Louisiana, United States
Posted: May 05, 2010 at 10:03 PM / IP Logged  
SCV = Speed Controlled Volume.  I have seen 3 or 4 of these decks that do exactly what yours is doing.  I am pretty sure the problem is the deck.  We have replaced a couple of the decks and as far as I know they never came back saying that the problem was still there.  If you do not want to replace the deck I would try cutting the VSS wire from the back of the deck.   It uses the VSS wire to determine speed and it increases the volume accordingly.  I have no idea if cutting the vss wire will fix your problem.  But it may be worth a shot.
sisko 
Member - Posts: 3
Member spacespace
Joined: May 05, 2010
Location: California, United States
Posted: May 05, 2010 at 11:19 PM / IP Logged  

Nice... I just ordered the insert and I'll shop for the deck tomorrow.  Thanks so much.'96 chevy tahoe stereo problem short? -- posted image.

boxhead78 
Copper - Posts: 84
Copper spacespace
Joined: October 07, 2009
Location: California, United States
Posted: May 08, 2010 at 8:30 PM / IP Logged  
change your stereo that is the problem
boxead78

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