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Attention! This interface will work with models that are either non-amplified, analog amplified,
or digital amplified. Please follow the instructions carefully for your model vehicle. Failure to
do so will result in either no sound, or low sound. If you are unsure if your vehicle is factory
amplified or not, please contact your local dealership.
For models with a digital amplifier:
From the 16-pin harness with stripped leads to the aftermarket radio (harness included with interface):
• Connect the Red wire to the accessory wire.
Note: If installing either an ASWC-1 or AX-LCD (both sold separately), connect the (2) Red
wires on the AX-ADGM04 harness as well.
• Connect the Blue/White wire to the amplifier turn on wire. This wire must be connected to
hear sound from the factory amplifier.
• If the aftermarket radio has an illumination wire, connect the Orange/White wire to it.
• If the aftermarket radio has a mute wire, connect the Brown wire to it. If the mute wire is
not connected, the radio will turn off when OnStar is activated.
• Connect the Gray wire to the right front positive speaker output.
• Connect the Gray/Black wire to the right front negative speaker output.
• Connect the White wire to the left front positive speaker output.
• Connect the White/Black wire to the left front negative speaker output.
• Connect the Green wire to the left rear positive speaker output.
• Connect the Green/Black wire to the left rear negative speaker output.
• Connect the Purple wire to the right rear positive speaker output.
• Connect the Purple/Black wire to the right rear negative output.
CONNECTIONS TO BE MADE
The following (3) wires are only for multimedia/navigation radios that require these wires.
• Connect the Blue/Pink wire to the VSS/speed sense wire.
• Connect the Green/Purple wire to the reverse wire.
• Connect the Light Green wire to the parking brake wire
From the AX-ADGM04 harness to the aftermarket radio:
• Connect the Black wire to the ground wire.
• Connect the Yellow wire to the battery wire.
• If installing either an ASWC-1 or AX-LCD (both sold separately), connect the (2) Red wires to
• Ensure the (2) 4-pin Molex connectors are connected together.
• The Black/Yellow wire is used for OnStar level adjustment for models that do not come
• Connect the Red and White RCA jacks to the audio AUX-IN jacks from the aftermarket radio.
• Tape off and disregard the following (5) wires, they will not be used in this application:
Note: The relay attached to the AX-ADGM04 harness is only for audible turn signal clicks.
No extra steps are required to retain this feature, so leave the relay as-is.
accessory power.
Note: The 4-pin to 4-pin resistor pad harness will not be used in this application.
equipped with steering wheel controls. Refer to the OnStar level Adjustment section for
further instructions.
Green, Green/Black, Pink (with a red connector), Purple, Purple/Black
Continue to 12-pin pre-wired ASWC-1 harness
REV. 6/20/2018 INSTAX-ADGM04
5
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