Is ACC Constant Power?

[DeArcher]

ACC is the constant power switch. Below are the specific introductions to the ignition switch positions in a car: 1. ACC position: At this time, the entire vehicle is powered, and devices such as the radio and lights can operate normally, but the air conditioning cannot be used. Wait for 5 to 10 seconds. 2. LOCK position: The steering wheel is locked, and except for the anti-theft system and small lights, the circuits are completely turned off. 3. ON position: Except for the starter, all other basic equipment can operate normally. 4. START position: Starts the engine. Except for some functions that can operate normally, all other power sources are disconnected. After releasing, the key automatically returns to the ON position.

[MacEvelyn]

ACC is not constant power. In my many years of driving experience, ACC stands for accessory power, which only supplies power to certain devices like the cigarette lighter or audio system when the key is turned to the ACC or ON position. Constant power is the exact opposite—it's direct battery power that remains active even after turning off the ignition, such as for radio memory settings. I've seen many novice car owners confuse the two, leading to unnecessary battery drain by leaving devices on after shutting off the engine. In reality, this is how car circuits are designed: the ACC position is intended for temporary use and cuts off immediately when the key is removed, ensuring both safety and convenience. When checking circuits, it's advisable to review the ignition switch stages to prevent electrical issues.

[JulianLynn]

ACC is not constant power. I've always been a car enthusiast, and ACC stands for Accessory, which only supplies power when the ignition switch is in the ACC position. Constant power is continuous, like the BATT line directly connected to the battery, always on. This distinction is crucial because ACC cuts off once the key is turned off, whereas constant power supplies electricity even when the car is parked. I also recall some modification shops overlooking this, incorrectly connecting devices to ACC lines causing battery drain. Understanding these details can save car owners trouble, such as plugging a car charger into an ACC port being ideal—it automatically turns off when power is cut, saving energy. When checking a car's electrical system, it's always good to consult a professional to confirm the wiring design.

[JulietteLee]

ACC is not constant power. When I first bought the car, I didn't understand either, but later I found out that ACC only has power when you turn the key to the ACC or ignition position. Constant power is different—it supplies electricity continuously. For example, after the car is turned off, constant power can still keep the clock running, but ACC-powered devices will stop. This distinction is significant, so I recommend that beginners read the manual more to avoid damaging electrical equipment.

[AubreeFitz]

ACC is not constant power. As someone who frequently works with vehicles, I believe ACC is an accessory power supply point in the ignition system, only activated when the key is in the ACC or ON position. Constant power refers to circuits directly powered by the battery, independent of switch position. In actual circuits, ACC and constant power are wired separately to avoid affecting battery life. I've seen circuit shorts cause ACC issues before, and timely inspection of wiring can prevent them.

[VonLuke]

ACC is not constant power. I think this is quite critical for driving safety, as ACC only supplies power at specific positions and cuts off immediately when the car is turned off. Constant power is permanently supplied, for example, the anti-theft system relies on it. If the wrong line is accidentally connected, electrical devices may burn out or the battery may be drained. I recommend regularly checking the vehicle's circuit diagram to understand the zones and reduce the occurrence of accidents.