Axxess GMOS-05

Axxess GMOS-05 OnStar Interface User Manual

Model: GMOS-05 | Brand: Axxess

1. Bubuka

The Axxess GMOS-05 OnStar Interface is designed to facilitate the replacement of an Original Equipment Manufacturer (OEM) radio with an aftermarket receiver in specific non-amplified GM vehicles. This interface is compatible with vehicles equipped with the "Door-n-Lock" style harness. It ensures the retention of key factory features, including OnStar functionality and safety/warning chimes, while also providing necessary outputs for navigation radio installations.

2. Émbaran Kasalametan

Please read all instructions carefully before installation. Improper installation may result in damage to the vehicle's electrical system, the interface module, or the aftermarket radio.

3. Eusi Paket

Verify that all items are present before proceeding with the installation.

Axxess GMOS-05 Interface Module and Wiring Harnesses
Gambar 3.1: Axxess GMOS-05 Interface Module and Wiring Harnesses. This image displays the main GMOS-05 interface module, a black rectangular box, along with two distinct wiring harnesses. One harness features a large white multi-pin connector, while the other has a smaller black connector, both designed for vehicle integration.

4. Setup jeung Instalasi

This section provides general instructions for installing the GMOS-05 interface. Specific vehicle disassembly and reassembly procedures are not covered and should be referenced from a vehicle-specific service manual or professional guide.

4.1. Sambungan Wiring

Match the wires from the GMOS-05 harness to the corresponding wires on your aftermarket radio's harness. Refer to the color codes below.

Close-up of Main Wiring Harness Connector
Gambar 4.1: Close-up of Main Wiring Harness Connector. This image shows a detailed view of the primary wiring harness, highlighting the multi-colored wires and the large white connector that interfaces with the vehicle's factory wiring. A smaller red connector is also visible, typically for specific signal wires.
GMOS-05 Wiring Color Code
Warna KawatFungsiNyambung ka
Konéng12V Constant PowerAftermarket Radio Yellow Wire
BeureumKakuatan aksésori 12VAftermarket Radio Red Wire
HideungtaneuhAftermarket Radio Black Wire
oranyeuPaneanganAftermarket Radio Orange Wire (if applicable)
Bulao/BodasAmplifier Hurungkeun-AktipkeunRadio Aftermarket Amp Turn-On Wire (if applicable)
HéjoSpeaker hareup kénca (+)Aftermarket Radio Left Front Speaker (+)
Héjo / HideungSpeaker hareup kénca (-)Aftermarket Radio Left Front Speaker (-)
BodasSpeaker hareup katuhu (+)Aftermarket Radio Right Front Speaker (+)
Bodas/HideungSpeaker hareup katuhu (-)Aftermarket Radio Right Front Speaker (-)
kulawuSpeaker Rear Kénca (+)Aftermarket Radio Left Rear Speaker (+)
kulawu/HideungSpeaker Rear Kénca (-)Aftermarket Radio Left Rear Speaker (-)
VioletSpeaker Rear Katuhu (+)Aftermarket Radio Right Rear Speaker (+)
Violet / HideungSpeaker Belakang Katuhu (-)Aftermarket Radio Right Rear Speaker (-)
Héjo LampuKaluaran marake parkirAftermarket Radio Parking Brake Input (for navigation)
BiruVehicle Speed Sense (VSS) OutputAftermarket Radio VSS Input (for navigation)
coklatNgabalikeun KaluaranAftermarket Radio Reverse Input (for navigation/camera)

Catetan: This wiring diagram is a general guide. Always refer to the specific wiring instructions provided with your aftermarket radio and vehicle for precise connections.

4.2. Léngkah Instalasi

  1. Nyiapkeun Kandaraan: Disconnect the negative battery terminal. Remove the factory radio from the dashboard.
  2. Sambungan Kawat: Connect the wires from the GMOS-05 harness to the aftermarket radio harness according to the wiring color code (Section 4.1). Solder and heat-shrink all connections for reliability.
  3. Connect GMOS-05 Module: Plug the prepared GMOS-05 harness into the GMOS-05 interface module.
  4. Sambungan Kendaraan: Connect the vehicle-specific connectors from the GMOS-05 harness into the factory wiring harnesses in the vehicle's radio opening.
  5. Kaluaran Navigasi: If installing a navigation radio, connect the Light Green (Parking Brake), Blue (VSS), and Brown (Reverse) wires from the GMOS-05 harness to the corresponding inputs on your navigation radio.
  6. Sistem tés: Before reassembling the dashboard, reconnect the vehicle's negative battery terminal. Turn on the ignition and test the aftermarket radio, OnStar, and safety chimes.
  7. Saluyukeun Setélan: Adjust OnStar volume and chime levels as described in Section 5.1.
  8. Majelis ahir: Once all functions are verified, securely mount the aftermarket radio and reassemble the dashboard.

5. Operating Features and Adjustments

The GMOS-05 interface retains several factory features and allows for adjustments to optimize your audio experience.

5.1. OnStar and Chime Volume Adjustment

The GMOS-05 allows for independent adjustment of OnStar volume and safety/warning chime levels. This is typically done via potentiometers (small adjustment screws) located on the GMOS-05 module itself.

Perform these adjustments with the vehicle running and the aftermarket radio powered on to accurately gauge the sound levels.

5.2. Navigation Radio Outputs

The GMOS-05 provides dedicated outputs for aftermarket navigation radios, which require specific vehicle data for proper operation.

6. Pangropéa

The Axxess GMOS-05 interface module is designed for maintenance-free operation once properly installed.

7. Cara ngungkulan

Isu umum jeung Solusi
MasalahMungkin Cukang lantarananaSolusi
Teu aya audio tina radio aftermarket.Incorrect speaker wiring; no power to radio; interface not initialized.Verify all speaker wires are correctly connected. Check 12V constant and accessory power. Ensure the interface is properly connected to the vehicle's data bus.
OnStar or safety chimes are not working or are too loud/quiet.Incorrect connection to GMOS-05; volume potentiometers need adjustment.Confirm the GMOS-05 module is properly connected. Adjust the "OnStar Vol" and "Chime Vol" potentiometers on the module (refer to Section 5.1).
Radio aftermarket teu hurung.No 12V constant or accessory power; blown fuse.Check the vehicle's fuse box for blown fuses. Verify the Yellow (constant) and Red (accessory) wires are correctly connected and receiving power.
Navigation features (e.g., parking brake, VSS, reverse) are not functioning.Outputs from GMOS-05 not connected to navigation radio.Ensure the Light Green, Blue, and Brown wires from the GMOS-05 are correctly connected to the corresponding inputs on your navigation radio (refer to Section 4.1).

If troubleshooting steps do not resolve the issue, contact Axxess technical support or a certified installer.

8. Spésifikasi

9. Garansi jeung Rojongan

The Axxess GMOS-05 interface is manufactured by Metra Electronics. For warranty claims or technical support, please contact the retailer from whom the product was purchased. The retailer will then coordinate with Metra Electronics for warranty services. It is recommended to retain your proof of purchase for warranty purposes.

For additional technical assistance or detailed product information, please visit the official Axxess or Metra Electronics websitus.