Metra Electronics GMOS-04 installation instructions Toubleshooting

GMOS-04

TOUBLESHOOTING:

Chime Too Loud/Soft:

There are some instances where the chime is too loud or too soft. To resolve this follow these steps:

1.Make sure the ignition is turned to the “off” position.

2.Disconnect the 14 pin and 16 pin wire harnesses from the GMOS-04

3.Open up the GMOS-04 by squeezing the sides of the top cover

4.Locate the potentiometer facing up on the circuit board, this is the Chime potentiometer

5.Taking a small flat headed screwdriver, turn the potentiometer clockwise to decrease the chime level; turning the potentiometer counterclockwise will increase the chime level

6.After adjustment replace top cover of GMOS-04 and reconnect wire harnesses

Distorted Audio Output:

When using the GMOS-04 with a radio that has a high pre-out voltage, usually greater than 2 volts, the audio signal may become distorted. To resolve this follow these steps:

1.Make sure the ignition is turned to the “off” position

2.Disconnect the 14 pin and 16 pin wire harnesses from the GMOS-04

3.Open up the GMOS-04 by squeezing the sides of the top cover

4.Locate the potentiometer next to the 10 pin board mounted connector located at the end of the GMOS-04

5.Taking a small flat headed screwdriver, turn the potentiometer counter- clockwise to lower the input level going to the factory amplifier

6.After adjustment replace top cover of GMOS-04 and reconnect wire harnesses.

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