FAW J6P Function Switch: Deconstructing 11 Critical Parts for Flawless Driver Control

This is a complete technical guide to the FAW J6P Function Switch assembly (Model 5310060-B27) for the FAW Jiefang CA3250P66K2L1T1E 6×4 dump truck. This deconstruction analyzes 11 serviceable component types that form the dash-mounted electrical control panel, which manages critical truck operations.

The FAW J6P Function Switch assembly is the driver’s interface for controlling auxiliary electrical systems and drivetrain features. Located typically on the center console or dashboard, this panel centralizes control for systems ranging from lighting and safety indicators to specialized dump truck functions like Power Take-Off (PTO) and differential locks. This centralization improves driver efficiency and reaction time.

This deconstruction will analyze the key serviceable switches and components that make up the FAW J6P Function Switch module. This includes the main panel, the individual rocker switches, and the complex mechanical and electrical safety interlocks. A properly functioning FAW J6P Function Switch is essential for safe engagement of high-power systems and ensuring the driver has reliable control over critical chassis features.

Core 1: The “Control Interface” Logic (The Panel and Switches)

This group represents the main structural and functional components of the FAW J6P Function Switch assembly, providing the driver with access to core systems.

1. Component: ‘Right side switch panel’ (5310060-B27) – Qty 1
This (Comp 1) is the main physical panel that the switches snap into. The Modular Panel Logic allows the switches to be configured differently based on the vehicle’s options (e.g., whether it has PTO, an inter-axle lock, or specialized auxiliary lights). The rest of the switches are inserted into the blank ports of this panel, creating the complete FAW J6P Function Switch assembly.

2. Component: ‘Function switch cover plate’ (3735021-B27) – Qty 9
This (Comp 5) is the set of blank plates used to cover the empty switch slots in the main panel (Comp 1). The quantity of 9 suggests many accessory options are available but not installed on this specific model. These ensure the FAW J6P Function Switch remains sealed against dust and debris.

3. Component: ‘Preheat switch assy’ (3750050-B27) – Qty 1
This (Comp 6) is the switch used to activate the engine’s glow plugs or intake heater. This is a critical electrical switch in the FAW J6P Function Switch for starting the diesel engine in cold weather.

Core 2: The “Drivetrain & Safety” Logic (Critical Switches)

This group of components controls the vehicle’s critical drivetrain and safety functions. Their correct operation is non-negotiable for vehicle safety and performance.

1. Component: ‘Inter-axle diff lock switch assy’ (3834010-B27) – Qty 1
This (Comp 9) is the switch that activates the inter-axle differential lock (the power divider lock). The Traction Logic is that this switch forces a 50/50 power split between the middle and rear axles, which is essential for maximizing traction in low-grip conditions. This is a high-priority switch in the FAW J6P Function Switch.

2. Component: ‘Wheel diff lock switch assy’ (3834050-B27) – Qty 1
This (Comp 10) is the switch that controls the wheel-to-wheel differential lock on the drive axles. Activating this switch forces both wheels on the same axle to turn together, eliminating wheel spin. This is the ultimate traction control available via the FAW J6P Function Switch.

3. Component: ‘Hazard warning switch assy’ (3726050-B27) – Qty 1
This (Comp 3) is the switch that activates the emergency flashing lights. This is a critical safety component of the FAW J6P Function Switch, designed for immediate use during roadside emergencies.

4. Component: ‘Hydraulic steering control switch assy’ (3818045-B27) – Qty 1
This (Comp 11) is the control switch for the hydraulic steering system. The Auxiliary Hydraulic Logic is that this may be a dedicated switch for hydraulic pressure control or a pressure-sensing function related to the steering pump. Its inclusion in the FAW J6P Function Switch suggests a manual override or diagnostic capability is available to the driver.

Core 3: The “Auxiliary & Service” Logic (PTO & Lights)

This group handles secondary and utility functions controlled from the FAW J6P Function Switch panel, such as auxiliary lighting and power take-off engagement.

1. Component: ‘Brake PTO switch assy’ (3772030-B27) & ‘PTO switch assy’ (3772040-B27) – Qty 1 each
These (Comp 7, 8) are the Power Take-Off switches. The PTO Engagement Logic often involves two stages: a main switch (Comp 8) to arm the system, and a secondary switch (Comp 7, ‘Brake PTO’) that may be linked to the pneumatic brake system. This linkage is a critical safety feature, ensuring the PTO can only be engaged when the vehicle is stationary, which is vital for hydraulic operations (like raising the dump body). This is a specialized control within the FAW J6P Function Switch.

2. Component: ‘Horn switch assy’ (3721120-B27) – Qty 1
This (Comp 2) is the dedicated switch for selecting between the different vehicle horns (e.g., standard electric horn vs. pneumatic air horn). This is a common feature in a FAW J6P Function Switch for dump trucks, as the loud air horn is often reserved for off-road or emergency signaling.

3. Component: ‘Rear fog lamp switch assy’ (3732070-B27) – Qty 1
This (Comp 4) controls the high-intensity rear fog light. This is a safety requirement in many regions, ensuring the large truck is visible from the rear in dense fog. This switch is located on the FAW J6P Function Switch panel for immediate access.

FAW J6P Function Switch: Complete 11-Part Breakdown

The following table provides the complete, detailed breakdown of all 11 component types in the FAW J6P Function Switch assembly for the FAW Jiefang CA3250P66K2L1T1E 6×4 dump truck. This list is essential for ordering spare parts and servicing the cab electronics.

Core Specifications

The specifications for the FAW J6P Function Switch are defined by its modular design, centralizing control for critical drivetrain and safety functions within the cab. A reliable FAW J6P Function Switch is vital for operator control.