Here is a step-by-step guide on how to connect the ACC wire:
1. Disconnect the negative battery terminal. This will help to prevent any electrical shock or damage to the stereo.
2. Locate the ACC wire on the vehicle. The ACC wire is typically red and may be labeled "ACC" or have an "A" next to it.
3. Connect the ACC wire of the stereo to the ACC wire of the vehicle. Use a crimp connector or solder the two wires together.
4. Insulate the connection with electrical tape.
5. Reconnect the negative battery terminal.
6. Test the stereo to make sure that it turns off with the car.
If the stereo does not turn off with the car, you may have connected the wrong wire to the ACC wire on the stereo. Double check the wiring and make sure that the ACC wire is connected to the correct wire on the stereo.