PAC OEM-1 Wiring Interface Instructions
- June 15, 2024
- PAC
Table of Contents
PAC OEM-1 Wiring Interface
Product Information
- Specifications
- OEM-1 REV. 10-23-02 Compatible with aftermarket head units
- Available cables: A, B, C
Product Usage Instructions
- Installation instructions for cables on List A
- List A cables are used for replacing the factory head unit. Follow the steps below:
- Consult your stereo’s owner’s manual to identify the wire functions.
- Check the wire function with the head unit you have.
- If any wires are not in the correct pin location, move them accordingly.
- Installation instructions for cables on List B
- List B cables are used when replacing a factory radio. Follow the steps below:
- Ensure you have the appropriate cable from List A.
- Plug one end of the List B cable into the vehicle dash harness that was removed from the factory radio.
- Splice the AMP-UNV harness into the vehicle harness using the 16 pin chart provided for wire identification.
- Plug the other end of the List B cable into the 16 pin connector of the OEM-1.
TERMINAL IDENTIFICATION
WIRE AND TERMINAL IDENTIFICATION
The following identifies the wire color and corresponding circuit:
| WIRE COLOR | CIRCUIT |
|---|---|
| ORANGE | ILLUMINATION |
| BLUE/WHITE | AMP TRIGGER |
| BLACK | GROUND |
| PURPLE/BLK | RIGHT REAR(-) |
| GREEN/BLACK | LEFT REAR(-) |
| GRAY/BLACK | RIGHT FRONT(-) |
| WHITE/BLACK | LEFT FRONT(-) |
| RED | IGNITION SWITCH 12V |
| YELLOW | BATTERY |
| BLUE | POWER ANTENNA RIGHT REAR (+) |
| PURPLE | LEFT REAR (+) |
| GREEN | RIGHT FRONT (+) |
| GRAY | LEFT FRONT (+) |
Input of the OEM-1, 18 pin connector (Cable A or C)
The following identifies the wire color and corresponding circuit:
| WIRE COLOR | CIRCUIT |
|---|---|
| WHITE/BLK | LEFT FRONT |
| GRAY/BLK | RIGHT FRONT |
| GREEN/BLK | LEFT REAR(-) |
| PURPLE/BLK | RIGHT REAR(-) |
| BLACK | GROUND |
| BLUE | POWER ANTENNA |
| ORANGE | ILLUMINATION/DIMMER |
| BLUE/WHITE | AMP TRIGGER |
| RED | IGNITION/SWITCHED |
Installation instructions for cables on List C
List C cables are used for adding or replacing factory amplifiers. Follow the steps below:
- Use the AMP-RCA cable connected to the 16 pin connector of the OEM-1 to connect your aftermarket amplifier.
- The AMP-RCA cable provides 2 pairs of female RCA jacks and a remote turn-on lead.
Installation instructions for the AMP-RCA cable
The AMP-RCA cable is used when replacing or adding aftermarket amplifiers to a factory amplified system. Follow the steps below:
- Ensure you have the appropriate cable from List C.
- Connect the AMP-RCA cable to the 16 pin connector of the OEM-1.
- Use the provided 2 pairs of female RCA jacks and the remote turn-on lead to connect to your aftermarket amplifier.
FAQ
- Q: What is the goal of setting the FAI gain?
- The goal is to set the FAI gain high enough to get a clean signal but not so high that distortion is introduced. This should be done for all 4 channels.
Installation instructions
Installation instructions for cables on Jist “A”
- The “A” cable, is used when replacing a factory radio. (the appropriate cable from list “8” is also required).
- One end of cable plugs into or connects to your new aftermarket head unit and the other end plugs into the 18 pin connector of the OEM-1_ When using the complete OEM-1 system the radio will be current protected by the vehicle fuse.
- The installer must decide to transfer any other fuses or noise filters from the harness provided with the head unit.
- Use the wire I terminal identification chart below to locate the correct power wires.
- The low level inputs are for radios up to 25watts x 4.
- While every effort has been made to insure this cable was made to connect properly to your aftermarket head unit, changes in models and configurations do occur.
- To prevent potential damage consult your stereo’s owners manual and check wire function (as shown below) with that of the head unit you have.
- Move any wires that are not in the correct pin location for you head unit.
Installation instructions for cables on list “B”
- The “B” cable, is used when replacing a factory radio. (the appropriate cable from list “A” is also required).
- One end of this cable plugs into the vehicle dash harness that was removed from the factory radio. (the AMP-UNV harness must be spliced into the vehicle harness, use the 16 pin chart below for wire identification).
- The other end plugs into the 16 pin connector of the OEM-1.
WIRE AND TERMINAL
WIRE AND TERMINAL /DENT/FICATION
- Output of the OEM-1, 16 pin connector (cable “B” or AMP-RCA). Looking into connector I wire side of cable.
| WIRE COLOR | CIRCUIT | CIRCUIT | WIRE COLOR | ||
|---|---|---|---|---|---|
| ORANGE | ILLUMINATION | 8 | 16 | IGNITION SWITCH 12V | RED |
| BLUE/WHITE | AMP TRIGGER | 7 | 15 | BATTERY | YELLOW |
| BLACK | GROUND | 6 | 14 | POWER ANTENNA | BLUE |
| PURPLE/ BLK | RIGHT REAR(-) | 5 | 13 | ■ RIGHT REAR(+) | PURPLE |
| GREEN/ BLACK | LEFT REAR(-) | 4 | 12 | LEFT REAR(+) | GREEN |
| N/C | 3 | 11 | N/C | ||
| GRAY/ BLACK | RIGHT FRONT(-) | 2 | 10 | RIGHT FRONT(+) | GRAY |
| WHITE/ BLACK | LEFT FRONT 1-l | 1 | 9 | LEFT FRONT /+l | WHITE |
Input of the OEM-1 , 18 pin connector (cable “A” or “C”). Looking into connector I wire side of cable.
| WIRE COLOR | CIRCUIT | CIRCU | WIRE COLOR | ||
|---|---|---|---|---|---|
| WHITE/ BLK | LEFT FRONT 1-l | 9 | 18 | LEFT FRONT LOW LEVEL/+) | WHITE/RED |
| GRAY/ BLK | RIGHT FRONT/-) | 8 | 17 | LEFT FRONT HIGH LEVEL/+) | WHITE |
| GREEN/BLK | LEFT REAR(-) | 7 | 16 | RIGHT FRONT LOW LEVEL(+) | GRAY/RED |
| PURPLE/ BLK | RIGHT REAR(-) | 6 | 15 | RIGHT FRONT HIGH LEVEL(+) | GRAY |
| BLACK | GROUND | 5 | 14 | ■ LEFT REAR LOW LEVEL(+) | GREEN/RED |
| BLUE | POWER ANTENNA | 4 | 13 | LEFT REAR HIGH LEVEL l+l | GREEN |
| ORANGE | ILLUMINATION/ DIMMER | 3 | 12 | RIGHT REAR LOW LEVEL(+) | PURPLE/RED |
| BLUE/WHITE | AMP TRIGGER | 2 | 11 | RIGHT REAR HIGH LEVEL/+) | PURPLE |
| RED | IGNITION/ SWITCHED | 1 | 10 | BATTERY | YELLOW |
Cables for adding or replacing factory amplifier.
Installation instructions for cables on list “C”
- The “C” cable, is used when replacing or adding aftermarket amplifiers to a factory amplified system. (the cable model# AMP-RCA is also required) This cable plugs in between the factory radio and the dash harness that was removed from the factory radio.
- The 18 pin connector then plugs into the OEM-1.
- The factory system remains unchanged using this cable. The ADD-UNV cable is used for universal connection to the vehicle harness for vehicles not listed. (splicing required) Audio should be at a low level when using this cable.
- Use the AMP-RCA cable connected to the 16 pin connector of the OEM-1 to connect your aftermarket amplifier. The AMP-RCA provides 2 pair of female RCA jacks and a remote turn on lead.
Installation instructions for the AMP-RCA cable
- This cable is used when replacing or adding aftermarket amplifiers to a factory amplified system. (the appropriate cable from list “C” is also required) The AMP-RCA cable connects to the 16 pin connector of the OEM-1 and provides 2 pair of female RCA jacks and a remote turn on lead for connection to your aftermarket amplifier.
PAC Factory Amp Interface
PAC Factory Amp Interface (FAI) – Level Setting
The Pacific Accessory Corporation® FAI is equipped with four channels of output level controls (gains) which should be adjusted for proper sound level matching.
- Start by setting each gain dial on the FAI at minimum, or fully counterclockwise.
- Turn on your car stereo and set the volume to roughly 3/4 of what the maximum number is. (Example: If a radio volume scale is 0-40, you would set the volume to 30 for this process.)
- Ensure that any equalizer or bass boost settings are flat or set to their default positions.
- Play a piece of music with a known frequency response that covers the entire audio spectrum.
- This is important for setting the gain accurately.
- Turn the gain control on the FAI up slowly until you hear distortion in the audio.
- Back off slightly from the point where distortion occurs. This is done by inserting a small flat blade or Phillips head screwdriver into the gain adjustment holes, located on top of the FAI.
- By turning clockwise, the gain for that individual channel, or the amount of sound allowed to pass through the FAI is increased. By turning counterclockwise, the gain for that individual channel is decreased.
- The goal is to set the FAI gain high enough to get a clean signal but not so high that distortion is introduced. You will do this for all 4 channels.
Applicable Devices
Applicable devices as of November 2023.
CONTACT
- Pacific Accessory Corporation
- Sales 800-477-2267
- www.Pac-audio.com.
- 2500 E. Francis St. Ontario, CA 91761
- Tech support 866-931-8021
- techsupport@pac-audio.com.
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