User Manual Q&AAnswer
Feb 04, 2025 - 03:34 AM
To install the PAC ROEM-GM21 Premium Sound System Interface, you will need to follow the instructions provided in the manual. Here is a step-by-step guide on how to connect the cables and what each wire is for:
1. Installation instructions for cables on list "A":
- Connect one end of the "A" cable to your new aftermarket head unit.
- Plug the other end of the "A" cable into the 18 pin connector of the OEM-1.
- The "A" cable is used when replacing a factory radio and is necessary for proper connection.
2. Installation instructions for cables on list "B":
- Connect one end of the "B" cable to the vehicle dash harness that was removed from the factory radio.
- Plug the other end of the "B" cable into the 16 pin connector of the OEM-1.
- The "B" cable is used when replacing a factory radio and is required along with the "A" cable.
3. Wire and Terminal Identification:
- Refer to the wire and terminal identification chart provided in the manual.
- Locate the correct power wires using the chart.
- The low level inputs are for radios up to 25 watts x 4.
4. Installation instructions for cables on list "C":
- The "C" cable is used when replacing or adding aftermarket amplifiers to a factory amplified system.
- Plug one end of the "C" cable between the factory radio and the dash harness.
- Plug the 18 pin connector of the "C" cable into the OEM-1.
- The factory system remains unchanged using this cable.
5. Installation instructions for the AMP-RCA cable:
- The AMP-RCA cable is used when replacing or adding aftermarket amplifiers to a factory amplified system.
- Connect the AMP-RCA cable to the 16 pin connector of the OEM-1.
- The AMP-RCA cable provides 2 pairs of female RCA jacks and a remote turn-on lead for connection to your aftermarket amplifier.
6. Troubleshooting:
- If the rear speakers do not work after installation, you may need to make additional connections.
- For specific instructions based on your vehicle model, refer to the manual.
- In some cases, connecting specific wires together may be necessary to correct the issue.
Please note that the instructions provided here are a general guide. It is important to consult the manual for your specific vehicle and head unit to ensure proper installation.
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