About the Metra 70-5518 Receiver Wiring Harness
What's in the box:
Metra 70-5518 Receiver Wiring Harness owner's manual
If you need assistance accessing this owner's manual, please give us a call.- 8" Wiring harness
- 13" RCA harness
Other info:
- MFR # 70-5518
- Item # 120705518
- California customers: Please click here for your Proposition 65 WARNING.
More details on the Metra 70-5518 Receiver Wiring Harness

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Features
Wiring Harness: This wiring harness prevents you from having to cut your vehicle's factory radio plug when replacing your factory radio with an aftermarket head unit. Simply solder or crimp the wiring harness to your aftermarket head unit's harness (solder & crimps not included), plug the aftermarket head unit's plug into the rear chassis of the aftermarket head unit, and plug the wiring harness into your vehicle's factory radio plug.
Wiring Notes: If the wiring harness is not equipped with a ground wire, you will need to ground the aftermarket head unit's ground wire to the metal chassis of your vehicle. Some vehicle's may require you to bypass the vehicle's factory amplifier (in another location from factory radio) or hardwire certain connections. If your vehicle is equipped with factory steering wheel controls, an additional adapter is required & sold separately.
Wire Code Chart:
(Receiver Wiring Harness)
Wire Color | Function |
---|---|
Red | +12 Volt Accessory |
Yellow | +12 Volt Constant |
Black | Chassis Ground |
Black/White | Amp Ground |
Orange | Illumination |
Orange/Black | Not Used (tape-off) |
White | Not Used (tape-off) |
White/Black | Not Used (tape-off) |
Gray | Not Used (tape-off) |
Gray/Black | Not Used (tape-off) |
Green | Left Rear Speaker + |
Green/Black | Left Rear Speaker - |
Violet | Right Rear Speaker + |
Violet/Black | Right Rear Speaker - |
(Subwoofer/Center-Channel Harness)
Wire Color | Function |
---|---|
Blue/White | Amp Turn-On |
White RCA | Left Front Speaker channel |
Gray RCA | Right Front Speaker channel |
Green RCA | Left Subwoofer channel |
Purple RCA | Right Subwoofer channel |
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Customer Q&A
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Very satisfied overall with the wiring harness and it was a breeze to hookup!!
Jeff from Wilmington, NC