Poor AM reception with AVIC
Thread Starter
Instructor
Joined: Feb 2009
Posts: 163
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From: Yorba Linda Ca
Poor AM reception with AVIC
I had an AVIC F700bt installed into an 08 C6 non Bose. I like to listen to the news and traffic reports sometimes but the AM radio reception is awful. Originally I had Best Buy install it and they used the GMOS-04. They added a relay as described in the C6 Audio FAQ post:
Trouble with the Metra GMOS-04?
Quote:
6. A Relay is needed in the 2005-2007 Corvette. You will need to cut the blue/white wire in half
between the 16 way Molex and 24 way gray connector.
• Connect the blue/white wire coming from the 16 way Molex to pin 85 of the Relay.
• Connect the blue/white wire coming from the 24 way connector to pin 30 of the Relay.
• Connect pin 86 of the Relay to Ground.
• Connect pin 87 of the relay to fused 12 volt constant wire. Using tape or a wire tie securely the
Relay from moving around in the dash.
At one point I also put in the voltage regulator described in:
Antenna Amp Triggering for Improved Reception with Aftermarket Head
http://forums.corvetteforum.com/audi...1&postcount=10
So far it has not helped. Both of the above use the blue/white wire. Does anyone have any other suggestions? I read one post that recommended disconnecting the passenger side antenna amplifier, but I have not found its location. Taking off the rear facia seems a bit too much.
Thanks
Trouble with the Metra GMOS-04?
Quote:
6. A Relay is needed in the 2005-2007 Corvette. You will need to cut the blue/white wire in half
between the 16 way Molex and 24 way gray connector.
• Connect the blue/white wire coming from the 16 way Molex to pin 85 of the Relay.
• Connect the blue/white wire coming from the 24 way connector to pin 30 of the Relay.
• Connect pin 86 of the Relay to Ground.
• Connect pin 87 of the relay to fused 12 volt constant wire. Using tape or a wire tie securely the
Relay from moving around in the dash.
At one point I also put in the voltage regulator described in:
Antenna Amp Triggering for Improved Reception with Aftermarket Head
http://forums.corvetteforum.com/audi...1&postcount=10
So far it has not helped. Both of the above use the blue/white wire. Does anyone have any other suggestions? I read one post that recommended disconnecting the passenger side antenna amplifier, but I have not found its location. Taking off the rear facia seems a bit too much.
Thanks
Last edited by MP35N; Oct 13, 2009 at 01:56 AM.
Le Mans Master
Joined: Sep 2001
Posts: 5,857
Likes: 84
From: Gainesville VA
You have any info on the 5v regulator? I didn't do anything like that. I just used some of the aftermarket adapters for the GM chime and stuff.
Tech Contributor
Joined: May 2003
Posts: 7,035
Likes: 134
From: North Augusta, SC
In C6's the white wire at B3 of the main plug needs 12VDC, not 5V. That's the wire that normally powers up the OEM amps.
C5's also use 12V to power the antenna amp gizmo, but also use 5V to trigger it. I don't think that link you referenced (click here) is correct for a C6.
Try putting the 12V antenna wire from the HU directly to B3 and see what happens.
C5's also use 12V to power the antenna amp gizmo, but also use 5V to trigger it. I don't think that link you referenced (click here) is correct for a C6.
Try putting the 12V antenna wire from the HU directly to B3 and see what happens.
Thread Starter
Instructor
Joined: Feb 2009
Posts: 163
Likes: 0
From: Yorba Linda Ca
I'm not using the regulator anymore, it didn't seem to make any difference, but the link came from the C6 audio FAQ's.
It's been a few weeks, but from what I remember the blue/white wire that powers the relay also went to the regulator. It doesn't seem right, and the reception sucks. I had the guys install a back up camera before I started messing with it, and I was thinking that maybe they loosened the wires going to the antenna amps. I just haven't managed to find them yet.
It's been a few weeks, but from what I remember the blue/white wire that powers the relay also went to the regulator. It doesn't seem right, and the reception sucks. I had the guys install a back up camera before I started messing with it, and I was thinking that maybe they loosened the wires going to the antenna amps. I just haven't managed to find them yet.
Tech Contributor
Joined: May 2003
Posts: 7,035
Likes: 134
From: North Augusta, SC
What is your complete setup? Since you have the GMOS04 I'm assuming you're still using the stock amp, right? If that's true, then the wire you were supplying with 5V from the regulator already had 12V on it since it's the same circuit that triggers the stock amp to turn on.
The antenna modules are on the rear wall of the hatch area.
The antenna modules are on the rear wall of the hatch area.
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Le Mans Master
Joined: Sep 2001
Posts: 5,857
Likes: 84
From: Gainesville VA
So do I need to do anything with this 5v stuff? This does make sense now, I ran the HU off the stock amp for a while and it was fine, as soon as I switched to my amp the reception started to suck...
Tech Contributor
Joined: May 2003
Posts: 7,035
Likes: 134
From: North Augusta, SC
-Pull fuse 31 under the hood (to keep old amp from powering up)
-Connect the 'antenna control' wire from your new HU to the white wire at B3 of the main radio harness
