Crane truck - What is the light switch?
The lighting switch of a truck crane is an operating device located inside the driver's cabin that controls the on/off and mode switching of the vehicle's lighting and signal lamps (such as headlights, marker lights, fog lights, turn signals, etc.). It is usually integrated on the left side of the steering wheel or the dashboard knob to ensure driving and operation safety.
Core Definition and Function
Essentially: The control element that closes or opens the lighting circuit, determining whether current flows to various lamps.
Function: Provides road lighting, marks the vehicle outline (marker lights), warns the surroundings (turning/flashlights/fog lights), directly related to driving and lifting operation safety.
Speciality: Compared to ordinary passenger cars, truck cranes, due to their chassis and upper vehicle separation structure, some models may add an independent switch for upper vehicle operation lighting (controls the working lights of the boom or hook area), requiring distinction between "driving lights" and "operation lights" control.
Common Types and Operating Positions
Paddle-type (mainstream): Located on the left side of the steering wheel, rotating the outer ring to switch between low beams/width lights/shut off, pushing or pulling forward/backward or swinging up/down to control high beams and turn signals.
Knob-type: Commonly found on the left side of the dashboard or the central control panel, rotating clockwise to the corresponding icon position (OFF → width lights → low beams → fog lights).
Independent button: Some large cranes have a separate button in the central control area to control the operation lights or warning flashing lights, a non-standard driving light system. Notes for Attention
Before operation, it is necessary to confirm that the vehicle is in "driving mode" or "working mode". For some models, the key needs to be powered on to the "ON" position before it can take effect.
If all the lights are not working and the starter does not respond, the problem is usually with the battery; if the starter works normally but only the lights are not working, it is mostly due to fuse, bulb or wiring issues.
The specific location and logic vary greatly depending on the brand (such as XCMG, Sany, Zhenlian, etc.) and chassis model. Please refer to the diagrams in the operation manual of this vehicle model.
The core function of the car crane's lighting switch is to control the on-off of the entire lighting and signaling system, ensuring safety during night/low visibility operations and compliance with steering and warning requirements.
Core functions:
Overall control start/stop: Manually or automatically connect/ the main lighting power circuits of the headlights， marker lights， etc.
Mode switching： Achieve the hierarchical switching of marker lights → near lights → far lights through rotation or pushing/pulling operations.
Signal linkage： Integrate control of turn signals (front and rear push)， fog lights， and hazard warning flashers to indicate operation intentions and emergency situations.
Operation assistance： Some models have a dedicated large arm working light switch， independently controlling high-brightness lighting in the lifting arm area to eliminate operation blind spots.
Operation logic (common combination switches)
Rotation position： 0 position (off) → 1 position (marker lights/indicators) → 2 position (headlights/near lights).
Push-pull operation： Upward pull/ as far light， downward press/ inward push as near light or flashing signal.
Independent buttons： Front and rear fog lights， dual flash warning lights are usually controlled by independent pressing switches.
Special precautions
Crane vehicles are special operation vehicles. In addition to the regular driving lights， it is necessary to ensure that the rotation warning lights and operation lighting lights are functioning properly. Some regulations require that specific warning light sources must be turned on during operation.
It is strictly prohibited to use the far light when overtaking or when there are people working at close range to prevent glare and potential safety accidents.
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