Why is the 4WD light flashing continuously?

[DeZachary]

There are several reasons why the 4WD light keeps flashing: Vehicle-related faults: Electromagnetic valve failure: The electromagnetic valve is damaged, or the vehicle's vacuum tube is broken, blocked, or incorrectly connected, resulting in the electromagnetic valve not being properly connected, which causes the flashing. Front-wheel drive controller failure: The front-wheel drive is disengaged by the vacuum generated after the engine starts, which drives the front-wheel drive controller through the vacuum tube. If the front-wheel drive controller fails or is damaged, the front-wheel drive cannot be disengaged, causing the yellow indicator light to flash. Human-caused faults: During an oil change, the vacuum tube was not properly connected, resulting in the electromagnetic valve not being connected, which causes the flashing.