When the system is “unlocked,” the air brake system operates normally. When locking a trailer, open the software application on the phone, enter the six-digit code, and press the “lock” button, and the system will “switch” the valve to the off position, which will engage the braking system to simulate as if someone is applying the trailer brakes. The brakes will stay in this position until released by the software “unlock” button on the mobile device.
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