Metra Axxess GMOS-04 Intermittent Mute or Attenuation

So, i just installed a Pioneer AVIC-Z130 in the whip and i'm using the Metra GMOS-04 as the harness to interface with the bose system.

There is an issue with the GMOS-04 because it keeps intermittently attenuating (muting) the AVIC via the mute wire.

Update: I am on GMOS-04 #3 and i have removed the mute wire from the AVIC. This fixes the problem.

Here are some tips for anyone using the Metra Axxess GMOS-04:

Do not connect the mute wire to your radio's harness. Your radio will intermittently attenuate or mute

The illumination wire does not work. The dimmer wire will dim only. It cannot be used for radio's that is expecting 0 Volts (lights off) or 12 Volts (lights on). This is not an issue with the interface, but a limitation of the vehicle (PAC has the same the problem). If you want the light, you must wire it elsewhere.

For radios that output more than 2v on the RCA's you must adjust the audio pot on the GMOS-04. For best results put the radio at 75% volume and use a multimeter on vehicle side of the harness to measure the voltage while you are adjusting the pot. you should not have to go past 3/4

Category:

Autos & Vehicles

Tags:

• Pioneer
• AVIC-Z130
• Metra
• Axxess
• GMOS-04
• Mute
• Attenuate

[jcmurphy1974]

This is pretty interesting.