Axxess GMOS-13 Installation Instructions

GMOS-13
at that volume until the Black/Yellow wire is tapped to
ground again. This can be set during installation and then
left alone. If user adjustment is desired, a momentary con-
tact switch (sold separately) can be added. Connect one
terminal from the switch to ground and the other terminal
to the Black/Yellow wire. The volume will change one level
every time the switch is pressed.

AUDIO LEVEL ADJUSTMENT

While using the GMOS-13, if the audio is distorted there is
a level adjustment on the interface.
To adjust the audio level follow these steps:
1. Locate the potentiometer next to the 14-pin connector
located on the GMOS-13.
2. Taking a small flat headed screwdriver, turn the po-
tentiometer counter-clockwise to lower the input level
going to the factory amplifier.
**Note: The chime volume will also adjust with the audio
level.
POTENTIOMETER
4
GMOS-13
K
NOWLEDGE IS
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certified technicians.
axxessinterface.com
1-800-221-0932
© COPYRIGHT 2004-2010 METRA ELECTRONICS CORPORATION
CADILLAC STS ONSTAR INTERFACE
P
OWER
GMOS-13

INSTALLATION INSTRUCTIONS

The GMOS-13 is designed to be used in
the 2005-10 Cadillac STS equipped with
Onstar and amplified system. It will retain
the warning chimes that are lost when the
factory radio is removed. The GMOS-13
also provides a 12-volt switched accessory
output along with Mute, Parking Brake,
Speed Sense (VSS), and Reverse outputs
for the installation of an aftermarket navi-
gation radio.
Cadillac STS 2005-10

INTERFACE COMPONENTS

• GMOS-13
• 14 pin harness with RCA's
• 16 pin harness to Cadillac harness

TOOLS REQUIRED

• Cutting tool • Crimping tool • Tape
• Connectors (ex: butt-connectors, bell caps, etc...)
1-800-221-0932
© COPYRIGHT 2004-2010 METRA ELECTRONICS CORPORATION

APPLICATIONS

axxessinterface.com