没有对应的引脚。不过有控制方法：

/sys/class/leds/led0/brightness

# Set the Pi Zero ACT LED trigger to 'none'.
echo none | sudo tee /sys/class/leds/led0/trigger

/home/pi# echo 0 > /sys/class/leds/led0/brightness

/home/pi# echo 1 > /sys/class/leds/led0/brightness

Python 示例：
from time import sleep
led = open('/sys/class/leds/led0/brightness', 'w', buffering=0)
while True:
led.write('0')#turn on
sleep(0.5)
led.write('1')#turn off
sleep(0.5)