The positive speaker wire is a solid color, your negative wire should have a stripe on it.
The white stripe on clear speaker wire is usually the positive wire. You may also find it with dashes and this is still the one that will carry the positive charge.
Left Front Speaker Positive Wire (+): White/Red Left Front Speaker Negative Wire (-): Brown Right Front Speaker Positive Wire (+): Green Right Front Speaker Negative Wire (-): White/Orange
I always use the black stripe as negative signal. Always do this and then when you have to disconnect something you won't get confused.(or as confused) but honestly it's just wire it's up to you.
the preious answer is very wrong. some car makers have a stripe on both wires. the best way to tell is leave the factory speaker hooked up take a 9 volt battery with wires attached to it and slide one wire into each connection. if the speaker pushes you have the positive and negative correct with the markings on the battery if the speaker pulls in the they are reversed. The wire with the stripe is the "negative" wire.
It actually does not matter as long as you are consistent. Most people choose to use the white stripe as positive, but it is definately not a rule.
According to color code, it is the speaker negative wire.
Yellow: 12v memory Red: 12v ignition (switched) Orange: Dash Light Black: Radio Chassis Ground Blue: Power Antennae White: Left Front positive White/Black Stripe: Left Front Negative Green: LR positive Green/Black Stripe: LR negative Grey: RF positive Grey/Black Stripe: RF negative Violet: RR positive Violet/Black Stripe: RR negative
Any marking (a white stripe, bump molded into the cable, different wire colours) is an indication for your reference only. It doesn't matter, as long as you connect the marked side on the amplifier to the same polarity on the speaker side.
In a DC circuit Red is positive and Black is negative. In AC systems White is neutral and Ground is green or green-yellow stripe.
probably connected to the two rear speakers. could be wrong To expound on the smart alec response from previous user; on a 2003 Mitsubishi Galant GTZ the rear deck speakers (6 X 9) wiring are a pair of wires Yellow and Grey (with a leading color indicator. The rear deck driver side speaker is grey w/blue stripe and yellow w/blue stripe. See below: Left Rear Speaker Positive Wire (+): Yellow/Blue Left Rear Speaker Negative Wire (-): Gray/Blue Right Rear Speaker Positive Wire (+): Yellow/Red Right Rear Speaker Negative Wire (-): Gray/Red
Positive is normally red or white with a red stripe. Negative is usually green or on rare occasions black. A multimeter will verify this.