T: +8615609213525
E: 15829336298@139.com
E: 15829336298@139.com
Room 1212-G107, Unit 2, Building 1, Block A, Shenglong Plaza, No. 80 Weiyang Road, Weiyang District, Xi'an City, Shaanxi Province
| Quantity: | |
|---|---|
811W25509-0145
Sinotruk HOWO
| Attribute | Description |
|---|---|
| Part Name | Left Side Combination Switch / Multi-Function Steering Column Switch |
| Common Names | Light and Wiper Control Lever, Turn Signal & Headlamp Switch Assembly |
| OE Number (Original Equipment) | 811W25509-0145 |
| Alternate Versions | 811W25509-0145/2, 811W25509-0145/3 (minor revisions or updated batches) |
| Manufacturer | Supplied by Sinotruk (CNHTC) and affiliated component manufacturers in Shandong, China |
| Location | Mounted on the left side of the steering column, within easy reach of the driver’s left hand |
| Function | Centralized control unit for key driving functions: |
Name1
Name2
| Parameter | Specification |
|---|---|
| Rated Voltage | 24V DC – Standard for heavy-duty commercial vehicles (compatible with 12V systems via relay) |
| Maximum Load Current | • Turn Signals: 5A × 2 (for flasher circuit) • Headlights: 10–15A total • Wipers: 8–10A (depending on motor load) |
| Contact Material | High-conductivity copper alloy strips and silver-plated terminals for minimal resistance and arcing |
| Housing Material | High-strength engineering plastic (ABS + PC blend), flame-retardant (UL94 V-0 rated) |
| Internal Components | Precision springs, wear-resistant sliders, detent mechanisms, and waterproof seals |
| Protection Rating | IP54 – Dust protected and splash resistant |
| Operating Temperature Range | -40°C to +85°C (-40°F to +185°F) |
| Dimensions (Approx.) | 25 cm × 10 cm × 15 cm (L × W × H) |
| Weight | Approx. 0.6 – 0.8 kg |
| Durability | Rated for over 100,000 cycles of lever movement and switch activation |
| Connector Type | Multi-pin plug-in harness (typically 10–16 pins), color-coded for compatibility |
| Mounting Method | Bolt-on bracket secured to steering column with M6/M8 screws |
⚠️ WARNING: Disconnect battery before working near airbag or electrical systems.
Park on level ground, turn off ignition.
Disconnect both battery terminals (start with negative).
Wait 2–3 minutes to discharge capacitors.
If the switch is behind the steering wheel:
Deactivate airbag system (optional but recommended).
Remove steering wheel cover or disconnect airbag connector safely.
Avoid using metal tools that could trigger accidental deployment.
Locate the mounting bolts behind the steering column shroud.
Remove lower and upper trim panels carefully.
Take note of wire routing and clip positions.
Unplug multi-pin connector(s) from the back of the switch.
Label wires if multiple connectors are present.
Unscrew mounting bolts (usually 2–3 M6 screws).
Gently pull out the old switch assembly — do not force it.
Insert new unit into place.
Secure with original bolts — torque to ~8–10 N·m.
Reconnect all electrical connectors firmly until they click.
Replace trim panels and fasteners.
Reconnect battery.
Turn key to ON position.
Test all functions:
Turn signals (left/right)
Low/high beam toggle
Flash-to-pass (pull lever toward you)
Wiper speeds (intermittent, low, high)
Washer spray
