In automotive wiring a pink would be a positive also.
The negative wires are usually black.
What is the blue wire on car stereo?
The turn-on wire (also called the remote wire) is located behind the stereo. On aftermarket stereos, it’s usually a blue and white wire. The remote wire will “tell” your amplifier to turn on whenever the stereo is powered up (usually, whenever the vehicle is turned on).
What is the orange wire on a car stereo?
Most aftermarket head units usually use an orange wire or an orange wire with a white stripe for this. The wire that still shows 12V is the accessory wire, which is usually red in aftermarket wiring harnesses. If only one wire ever had power in this step, it is the accessory wire.
What color is the power wire on a car radio?
Depending on the type of car you have, each wire’s function can vary. However, typically the red wire indicates “Power,” black indicates “Ground,” yellow indicates “Remote,” and striped, multicolored wires indicate speaker wires.
Photo in the article by “Max Pixel”