What is the ACC position for?
2 Answers
The ACC wire is located in the car's fuse box. Open the car's fuse box, turn off the vehicle's power, and ensure the dashboard lights are off. Locate the yellow fuse inside the fuse box and use the tip of a test pen to check the yellow fuse to see if the circuit has power. When the vehicle's power is turned on, if the test pen lights up on the yellow fuse, it can be confirmed as the ACC wire. Function of the ACC wire: The ACC wire is the ignition power wire, meaning it connects to the key-controlled ACC power supply. When the key is in the ACC position, i.e., connected to the ACC wire, certain electrical devices in the vehicle receive power, such as the radio, audio system, etc., while other components of the vehicle remain without power. ACC wire connection method: Locate the position of the car's ACC wire, then secure the daytime running lights in the appropriate position to begin wiring. Connect the black wire to the ground or the negative terminal of the battery; connect the red wire to the ACC relay; connect the two white wires to the headlight fuse; and connect the two yellow wires (or one yellow and one green) to the turn signal positive terminal. After installing the wiring harness, recheck to ensure there are no loose connections.
The ACC position is essentially the point where you turn your car key to power up the vehicle's electrical components, such as the radio and charging ports, without starting the engine. As someone who's been driving for years, I frequently use this setting when parked at gas stations or supermarkets to listen to music or charge my phone, saving the fuel needed to start the engine. It's a clever trick that avoids unnecessary engine idling and fuel waste, especially during short stops—reducing engine wear and being more eco-friendly. Once, I waited for someone in a parking lot for an hour with the ACC on playing the radio, and it didn't burn a drop of fuel. However, a word of caution: don't leave it on for too long, or you might drain the battery and need a jump-start. Overall, ACC is a convenient intermediate position that makes car usage more flexible and efficient.
