The red wire is for the 12 volt ignition, which can be attached to the stereo. The yellow wire is the 12 volt battery wire, which should also be attached to the stereo for power. The final wire, the black wire, is the ground wire. This wire, once attached to the stereo, will help ground it.

What is the red accessory wire in a car stereo?

The wire that still shows 12V is the accessory wire, which is usually red in aftermarket wiring harnesses.

What Are Key 1 and Key 2 wires?

These radios SWC wires are often identified as KEY 1 and KEY 2, or SW 1 and SW 2. This enables you to connect your Panasonic, Android radio, or another radio brand to our PAC interface to retain steering wheel controls with the radio without having to modify our 3.5mm connector.

Will car radio work if not grounded?

You cannot operate a car stereo without having a proper ground wire installed in your vehicles dashboard. The ground wire will allow your stereo to operate properly and without any malfunctioning problems when your vehicle is on, and the stereo system is activated.

Where do I connect key 1 and key 2 wires?

Key 1 and 2 are used for steering wheel control as well as some other applications like radios. You need to connect the key 1 or key 2 with the original steering wheel control wire. The button light control wire is referred to as Illum wire.

Where do you connect the ground wire on a radio?

1:181:49How to Make a Proper Ground Connection | Car Audio - YouTubeYouTube