no sound 09 vette
Thread Starter
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Joined: Mar 2011
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no sound 09 vette
my pioneer avic -x920bt everything functions just no sound. checked all the fuses in the car but didnt pull the radio out . it was working when I turned the car off sat nite ,got in it today no sound .
Tech Contributor
Joined: May 2003
Posts: 7,035
Likes: 134
From: North Augusta, SC
If you don't see an external amp in the trunk you most likely have the oem amp and speaker setup being fed through an interface adapter into the oem amp.
The most likely problem is that the inerface adapter went bad, but there are lots of possibilities.
C6 radio schematics are available HERE, make sure you checked all of the fuses that supply the radio, amp, and speakers.
If the fuses are good, you'll have to take the dash apart and check the adapter for +12v at pin B3 of the oem plug when the radio is on. If the trigger is good coming out of the radio, but not present at B3 pin, then you can splice a wire in to fix the problem (assuming you don't know where the adapter was purchased to get a new unit).
OEM amp is to the left of the fuse box under the passengers feet, but that probably isn't the issue.
Let us know what you find, it's sure to help someone else in the future.
The most likely problem is that the inerface adapter went bad, but there are lots of possibilities.
C6 radio schematics are available HERE, make sure you checked all of the fuses that supply the radio, amp, and speakers.
If the fuses are good, you'll have to take the dash apart and check the adapter for +12v at pin B3 of the oem plug when the radio is on. If the trigger is good coming out of the radio, but not present at B3 pin, then you can splice a wire in to fix the problem (assuming you don't know where the adapter was purchased to get a new unit).
OEM amp is to the left of the fuse box under the passengers feet, but that probably isn't the issue.
Let us know what you find, it's sure to help someone else in the future.
Thread Starter
Advanced
Joined: Mar 2011
Posts: 80
Likes: 0
If you don't see an external amp in the trunk you most likely have the oem amp and speaker setup being fed through an interface adapter into the oem amp.
The most likely problem is that the inerface adapter went bad, but there are lots of possibilities.
C6 radio schematics are available HERE, make sure you checked all of the fuses that supply the radio, amp, and speakers.
If the fuses are good, you'll have to take the dash apart and check the adapter for +12v at pin B3 of the oem plug when the radio is on. If the trigger is good coming out of the radio, but not present at B3 pin, then you can splice a wire in to fix the problem (assuming you don't know where the adapter was purchased to get a new unit).
OEM amp is to the left of the fuse box under the passengers feet, but that probably isn't the issue.
Let us know what you find, it's sure to help someone else in the future.
The most likely problem is that the inerface adapter went bad, but there are lots of possibilities.
C6 radio schematics are available HERE, make sure you checked all of the fuses that supply the radio, amp, and speakers.
If the fuses are good, you'll have to take the dash apart and check the adapter for +12v at pin B3 of the oem plug when the radio is on. If the trigger is good coming out of the radio, but not present at B3 pin, then you can splice a wire in to fix the problem (assuming you don't know where the adapter was purchased to get a new unit).
OEM amp is to the left of the fuse box under the passengers feet, but that probably isn't the issue.
Let us know what you find, it's sure to help someone else in the future.
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Tech Contributor
Joined: May 2003
Posts: 7,035
Likes: 134
From: North Augusta, SC
Center console instructions are linked to in C6 gen FAQ thread, I found this one with a quick search.
One quick thing to check, doe the radio sound work if selected to FM?
Dealer may not be too willing to solve problem if it's in aftermarket gear, but if they sold you the car it may help.
One quick thing to check, doe the radio sound work if selected to FM?
Dealer may not be too willing to solve problem if it's in aftermarket gear, but if they sold you the car it may help.
Thread Starter
Advanced
Joined: Mar 2011
Posts: 80
Likes: 0
Center console instructions are linked to in C6 gen FAQ thread, I found this one with a quick search.
One quick thing to check, doe the radio sound work if selected to FM?
Dealer may not be too willing to solve problem if it's in aftermarket gear, but if they sold you the car it may help.
One quick thing to check, doe the radio sound work if selected to FM?
Dealer may not be too willing to solve problem if it's in aftermarket gear, but if they sold you the car it may help.
Tech Contributor
Joined: May 2003
Posts: 7,035
Likes: 134
From: North Augusta, SC
The FM check was to make sure it was installed with the correct wire.
That makes it sound like a loose wire, but it could still be the adapter. Either way you can most likely fix it in under an hour if you pull the dash apart and have the needed parts available for the fix. Best case scenario you'd need a few butt-splice connectors and maybe about a foot of single strand wire.
That makes it sound like a loose wire, but it could still be the adapter. Either way you can most likely fix it in under an hour if you pull the dash apart and have the needed parts available for the fix. Best case scenario you'd need a few butt-splice connectors and maybe about a foot of single strand wire.
Le Mans Master
Joined: Nov 2003
Posts: 5,401
Likes: 52
From: Norman OK
If you have the PAC OS Interface you may need to do this simple mod, I did and so have lots of others. I have a Pioneer Z120 and after a few days the sound stopped everything else worked just no sound, after Dennis pointed me to web site I added this relay and everything works great, you can get the relay at autozone or anyplace.
http://www.pac-audio.com/PACProductD...rvette_fix.pdf
Its not to hard to get access to the HU just follow the instruction already posted to remove the center console bezal, the first time you do it you won't want to pull on it hard enough, at least I did not want to, but it does pull out without breaking anything just do it slow and don't jerk if off from the bottom or you could snap it. The biggest issue I had was with the shift ****. I have a auto and had put the car in drive to get the bezal off. BE careful to not strach the shift **** I warped mine in blue tape just to be careful
http://www.pac-audio.com/PACProductD...rvette_fix.pdf
Its not to hard to get access to the HU just follow the instruction already posted to remove the center console bezal, the first time you do it you won't want to pull on it hard enough, at least I did not want to, but it does pull out without breaking anything just do it slow and don't jerk if off from the bottom or you could snap it. The biggest issue I had was with the shift ****. I have a auto and had put the car in drive to get the bezal off. BE careful to not strach the shift **** I warped mine in blue tape just to be careful
Last edited by okie08vette; Mar 27, 2011 at 10:35 PM. Reason: Added info
Tech Contributor
Joined: May 2003
Posts: 7,035
Likes: 134
From: North Augusta, SC
Some of the adapters can't consistently put out enough current on the trigger wire to power up the oem amp. Installing the relay or a jumper around the interface solves that issue.
