What should a driver do to secure the towing vehicle before unhitching a trailer?
- Disconnect the electrical supply to the trailer lights and lower the jockey wheel.
- Lower the jockey wheel and then switch off the ignition.
- Correct answerApply the handbrake, switch off the ignition and engage a low gear.
- Apply the handbrake, lower the jockey wheel and switch off the engine.
Explanation
Before unhitching a trailer, apply the handbrake, switch off the ignition and engage a lower gear, so that the towing vehicle does not move while you are unhitching the trailer.
Read in Chinese
司机在解开拖车前应如何固定牵引车？
- 断开拖车灯的电源，并降低前支撑轮。
- 放下前支撑轮，然后关闭点火开关。
- 拉紧手刹，关闭点火开关，并挂入低速挡。
- 拉上手刹，放下前支撑轮并关闭发动机。
在解开拖车前，先拉上手刹，关闭点火开关并挂入低档，以防拖车车辆在解开拖车时移动。