70-8902 - Uncategorized Metra - Free user manual and instructions

Product Type	Receiver Wiring Adaptor
Brand	Metra
Model	70-8902
Compatibility	Select Subaru models (Forester, Legacy, Outback)
Input Voltage	12V DC
Wire Functions	Chassis Ground, Power Antenna, Amplifier Turn-On, Illumination, Switched Power, Constant Power, Speaker Channels (Front Left/Right, Rear Left/Right), Reverse (for backup camera), VSS (Forester only), Steering Wheel Control
Connection Method	Crimp caps (not included); plug into factory harness
Included Items	Wiring harness with pre-stripped wires
Installation Steps	Match wires by function, crimp connections, tape unused wires, plug into vehicle harness
Safety	Insulate unused wire ends with electrical tape
Repairability	Non-repairable; replace if damaged
Operating Temperature	Typical automotive interior range (-20°C to 70°C)
Material	PVC insulated wires, plastic connector housing
Weight	Approximately 100 g
Dimensions	Approximately 15 cm x 5 cm (harness length)

Frequently Asked Questions - 70-8902 Metra

What is the Metra 70-8902 used for?

The Metra 70-8902 is a receiver wiring adaptor that allows you to connect an aftermarket car stereo to the factory wiring harness in select Subaru vehicles (Forester, Legacy, Outback).

Which vehicles are compatible with the 70-8902?

It is designed for Subaru Forester, Legacy, and Outback models. Some wires are model-specific (e.g., VSS for Forester, Blue wire for Legacy/Outback).

Do I need any additional tools or parts?

Yes, you will need a wire stripper, crimp tool, and crimp caps (not included). Electrical tape is also recommended for insulating unused wires.

How do I connect the wires?

Match each wire from the adaptor to the corresponding function wire on your receiver (ignore color, match by function). Strip wires 1/2 inch, twist together, insert into a crimp cap, and squeeze the middle to secure.

What should I do with wires I don't use?

Individually tape off any unused wires with electrical tape to prevent short circuits.

Does this adaptor support steering wheel controls?

Yes, it includes a steering wheel control port that connects to the 120ASWC1 adaptor (sold separately). For JVC/Kenwood receivers, use the included 3.5mm 2-wire adaptor.

Can I use this with a backup camera?

Yes, there is a Green/Violet wire for reverse signal, used when installing a video/NAV receiver with a backup camera.

What are the wire colors and functions?

Key wires: Black (ground), Red (switched 12V), Yellow (constant 12V), Orange (illumination), Blue (power antenna), Blue/White (amp turn-on), Gray (right front), White (left front), Green (left rear), Violet (right rear). Refer to the manual for full details.

Is the 70-8902 hard to install?

Installation is straightforward: match and crimp wires, tape unused ones, then plug the adaptor into the factory harness in the dash. It requires basic wiring skills.

Where can I find the full manual?

The full manual is available for free download on notice-facile.com or the Crutchfield website. It includes detailed steps and diagrams.

USER MANUAL 70-8902 Metra

Receiver Wiring Adaptor

IMPORTANT

120 70-8902

Before starting, compare items on your invoice with items received. Thoroughly check packing materials. If an item is missing, please call Crutchfield at 1-888-955-6000.

Revision 10/10/17

STEP 1 -- MATCH & CONNECT WIRES

A. Match wires below to the matching function of each wire on your receiver (refer to instructions supplied with receiver). The wire colors of your new receiver may, or may not, match the wire colors of the adaptor. Match adaptor and receiver wires by function, disregarding color.
B. Your receiver illumination wire could be Orange or Orange/White. As with other wires, match this wire to the illumination wire in this harness by function, not by color. If your receiver does not have an illumination wire, tape off the illumination wire.
C. Individually tape off any unused wires.
D. Make final wiring connections following instructions on the next page.

Continue with these instructions to match and connect wires on the next page.

STEP 1 -- (continued)

Receiver Wiring Adaptor Connections

120 70-8902

STEP 2 -- CRIMP CONNECTIONS

Tools & Parts Required ▶

Wire Stripper/Crimp Tool Crimp Caps

A. Strip wires back 1/2".

Line drawing of a mechanical tool or device with internal components and a handle (no text or symbols)

B. Twist wires together and insert in crimp cap.

Diagram showing a cable being inserted into a plug, with an arrow indicating the insertion process (no text or symbols present)

C. Squeeze middle of cap for tight connection.

STEP 2 -- CONTINUED

D. Complete crimp connections for all necessary wires.
E. Be sure to wrap any wires from the Wiring Adaptor that are not necessary (wires with no match from the new receiver) with electrical tape.

Receiver Wiring Adaptor

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STEP 3 -- APPLICATION

When ready to install the receiver, plug the Wiring Adaptor from the new receiver or receiver assembly into the factory radio harness(es) in the vehicle dash.

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