ONSTAR LEVEL ADJUSTMENT
To adjust the Onstar volume level find the
Black/Yellow
wire on the 16-pin har-
ness. Push the blue Onstar button, while the voice is speaking tap the
Black/Yellow
wire to ground. There are 4 volume settings for Onstar; once the
4th setting is reached and the
Black/Yellow
wire is tapped to ground it will auto-
matically go back to the first volume setting. Once the volume is set it will stay 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 contact 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.
3
2
GMOS06
TOOLS REQUIRED FOR INSTALLATION
• Cutting Tool • Tape • Crimping Tool
• Connectors (ie: butt-connectors, bell caps, etc.)
4
HARNESS PREPARATION
* Important:
Before beginning any of the following, disconnect the negative
battery terminal to prevent accidental short circuit.
*
*Note:
The ignition power source of the Cadillac keeps the radio on until one
of the doors is opened. This is called the R.A.P. (retained accessory power).
The GMOS-06 is designed to retain this feature.
Connections to be made on the 14 pin harness:
1)
Connect the
white
RCA to the radio’s left front RCA output.
2)
Connect the
gray
RCA to the radio’s right front RCA output.
3)
Connect the
green
RCA to the radio’s left rear RCA output.
4)
Connect the
violet
RCA to the radio’s right rear RCA output.
Note:
If no RCA outputs are available, use the Metra line output converter
part # LOC-648 (sold separately).
5)
Connect the
blue/white
wire to the radio’s amplifier turn-on output.
6)
Connect the
red
wire to the radio’s 12-volt accessory or switched wire.
The following wires on the 14-pin harness are for the aftermarket radios
equipped with navigation features:
1)
Connect the
Brown
wire to the mute wire of the aftermarket radio.
2)
Connect the
Green
wire to the parking brake wire of the aftermarket radio.
3)
Connect the
Blue/Pink
wire to the VSS or speed sense wire of the
aftermarket radio.
4)
Connect the
Green/Purple
wire to the reverse wire of the aftermarket radio.
When completed, plug the 14-pin harness into the GMOS-06.
Connections to be made on the 16 pin harness:
1
) Connect the
yellow
wire to the radio’s 12-volt battery or memory wire.
Connections to be made on the 32-pin harness:
1)
Connect the
blue
wire to the radio’s antenna turn-on wire. If no antenna turn-
on wire is present, hook
blue
wire to the radio’s amplifier turn-on wire.
2)
Connect the
orange/white
wire to the radio’s dimmer wire. If no dimmer wire
is present, just tape off wire.
3)
Connect the
black
wire to the radio’s ground wire.
4)
The
black/white
wires are to be grounded only if engine noise is present,
otherwise insulate the unused wires.
When completed, plug the 16-pin harness into the GMOS-06.
INSTALLING THE GMOS-06
1)
With all connections completed to the aftermarket radio, plug the 32 pin
harness into the Cadillac’s wiring harness.
*Note:
some minor modifications may be necessary to the sub dash cavity to
accommodate the GMOS-06.
2)
Cycle the key by turning the ignition on then back off, then on again to test
the radio.
TESTING THE GMOS-06
1)
Turn the ignition on, then turn the radio on to verify that the radio works. Check
the balance control of the radio for proper operation.
2)
Push the Onstar button, if so equipped, to verify Onstar is working properly. The
radio will turn off or mute if the radio has this feature and Onstar will be heard
through the front speakers. Turn off Onstar and the radio will turn back on or
deactivate mute if equipped.
AUDIO LEVEL ADJUSTMENT
When using the GMOS-06 with a radio that has a high pre-out voltage the audio
signal may become distorted.
To resolve this follow these steps:
1.
Locate the potentiometer next to the 14-pin connector
located on the GMOS-06.
2.
Taking a small flat headed screwdriver, turn the potentiometer
counter-clockwise to lower the input level going to the factory amplifier.
Note:
The chime volume will also adjust with the audio input.
