The positive speaker wire is a solid color, your negative wire should have a stripe on it.
According to color code, it is the speaker negative wire.
The positive speaker wire is red while the negative speaker wire is black on a 2008 pathfinder.
1999 Mitsubishi Mirage Car Stereo Wire DiagramCar Radio Battery Constant 12v+ Wire: Red/BlackCar Radio Accessory Switched 12v+ Wire: BlueCar Radio Ground Wire: ChassisCar Radio Illumination Wire: Green/WhiteCar Stereo Dimmer Wire: Black/YellowLeft Front Speaker Positive Wire (+): Red/WhiteLeft Front Speaker Negative Wire (-): Red/BlueRight Front Speaker Positive Wire (+): RedRight Front Speaker Negative Wire (-): BlueLeft Rear Speaker Positive Wire (+): Yellow/BrownLeft Rear Speaker Negative Wire (-): Yellow/RedRight Rear Speaker Positive Wire (+): Light GreenRight Rear Speaker Negative Wire (-): Yellow/Green
The left speaker wire (+) is dark green, and the left speaker wire (-) is brown/red in the door of a 1997 Dodge Ram. For the right speaker, the right speaker wire (+) is purple, and the right speaker wire (-) is dark blue/red.
Car Radio Constant 12v+ Wire: Orange Car Radio Switched 12v+ Wire: Yellow Car Radio Ground Wire: Black Car Radio Illumination Wire: Gray Car Stereo Dimmer Wire: Brown Car Stereo Antenna Trigger: Pink Left Front Speaker Positive Wire (+): Tan Left Front Speaker Negative Wire (-): Gray Right Front Speaker Positive Wire (+): Light Green Right Front Speaker Negative Wire (-): Dark Green Left Rear Speaker Positive Wire (+): Brown Left Rear Speaker Negative Wire (-): Yellow Right Rear Speaker Positive Wire (+): Dark Blue Right Rear Speaker Negative Wire (-): Light Blue
Car Radio Battery Constant 12v+ Wire: Orange Car Radio Accessory Switched 12v+ Wire: Yellow Car Radio Ground Wire: Black Car Radio Illumination Wire: Gray Car Stereo Dimmer Wire: Brown Left Front Speaker Positive Wire (+): Tan Left Front Speaker Negative Wire (-): Gray Right Front Speaker Positive Wire (+): Light Green Right Front Speaker Negative Wire (-): Dark Green Left Rear Speaker Positive Wire (+): Brown Left Rear Speaker Negative Wire (-): Yellow Right Rear Speaker Positive Wire (+): Dark Blue Right Rear Speaker Negative Wire (-): Light Blue
1998 Toyota Tacoma Stereo Wiring InformationRadio Battery Constant 12v+ Wire: Blue/YellowRadio Accessory Switched 12v+ Wire: GrayRadio Ground Wire: BrownRadio Illumination Wire: GreenLeft Front Speaker Positive Wire (+): PinkLeft Front Speaker Negative Wire (-): PurpleRight Front Speaker Positive Wire (+): GreenRight Front Speaker Negative Wire (-): BlueLeft Rear Speaker Positive Wire (+): BlackLeft Rear Speaker Negative Wire (-): YellowRight Rear Speaker Positive Wire (+): RedRight Rear Speaker Negative Wire (-): White
Battery Constant 12v+ Wire: WhiteAccessory Switched 12v+ Wire: White/BlackGround Wire: BlackIllumination Wire: Red/YellowDimmer Wire: Red/GreenAntenna Trigger Wire: PinkLeft Front Speaker Positive Wire (+): WhiteLeft Front Speaker Negative Wire (-): Black/BlueRight Front Speaker Positive Wire (+): BlueRight Front Speaker Negative Wire (-): White/RedLeft Rear Speaker Positive Wire (+): Light GreenLeft Rear Speaker Negative Wire (-): Light Green/BlackRight Rear Speaker Positive Wire (+): GrayRight Rear Speaker Negative Wire (-): Gray/Black
CAR AUDIO FRONT SPAEKERS LOCATION: DOORS LEFT FRONT SPEAKER POSITIVE (+) WIRE: TAN LEFT FRONT SPEAKER NEGATIVE(-) WIRE: GRAY RIGHT FRONT SPEAKER POSITIVE (+) WIRE: LIGHT GREEN RIGHT FRONT SPEAKER NEGATIVE (-) WIRE: DARK GREEN CAR AUDIO REAR SPEAKERS LOCATION:REAR DECK LEFT REAR SPEAKER POSITIVE (+) WIRE: BROWN LEFT REAR SPEAKER NEGATIVE (-) WIRE: YELLOW RIGHT REAR SPEAKER POSITIVE (+) WIRE: DARK BLUE RIGHT REAR SPEAKER NEGATIVE (-) WIRE: LIGHT BLUE
yes
It will be the wire without the black line on it. Usualy the black line on a solid color will mean negative (-)