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: | |
|---|---|
WG2209280003
Sinotruk HOWO
| Attribute | Description |
|---|---|
| Part Name | Reverse Pressure Switch / Back-up Lamp Switch / Reverse Gear Indicator Switch |
| Common Names | Transmission Reverse Switch, Reverse Light Sensor, Gear Position Switch |
| OE Number (Original Equipment) | WG2209280003 |
| Manufacturer | Supplied by Sinotruk (CNHTC) and affiliated component manufacturers based in Jinan, China |
| Function | Detects mechanical pressure inside the transmission when reverse gear is engaged, then closes an electrical circuit to activate: |
Name1
Name2
| Parameter | Specification |
|---|---|
| Rated Voltage | Compatible with 24V DC (primary), also works with 12V DC systems (universal compatibility) |
| Maximum Load Current | Up to 5A resistive load (suitable for lighting circuits and low-power accessories) |
| Contact Material | High-conductivity copper alloy for stable signal transmission and corrosion resistance |
| Housing Material | Forged alloy steel body + impact-resistant ABS plastic cap (dual-material design) |
| Sealing | Integrated NBR or Viton O-ring seal prevents oil leakage and moisture ingress |
| Protection Rating | IP65 – Dust-tight and protected against water jets from any direction |
| Operating Temperature Range | -40°C to +120°C (-40°F to +248°F) |
| Thread Size | M14×1.5 or similar metric thread (standard for Chinese/European truck transmissions) |
| Torque Requirement | Install with 15–25 N·m torque — avoid over-tightening to prevent housing cracking |
| Weight | Approx. 0.2 kg |
| Dimensions | Approx. 8 cm × 3 cm × 3 cm (L × W × H) |
| Service Life | Rated for over 100,000 switching cycles under normal operating conditions |
⚠️ WARNING: Work involves transmission oil pressure and electrical circuits. Ensure vehicle is parked securely and power is disconnected.
Park on level ground and apply parking brake.
Turn off ignition and disconnect battery negative terminal.
If possible, drain some transmission oil to reduce spillage during removal.
Find the old switch mounted on the transmission case, usually near the rear extension housing or side cover.
Clean the area around it to prevent dirt from entering.
Disconnect the electrical connector (typically 2-pin).
Use appropriate socket or wrench to unscrew the switch counterclockwise.
Remove carefully — allow residual oil to drip out.
Check the threaded hole for damage or debris.
Replace damaged threads using a helicoil kit if necessary.
Apply a new O-ring seal (do not reuse old one).
Screw the new switch in by hand first to avoid cross-threading.
Tighten to 15–25 N·m using torque wrench — do not overtighten!
Plug in the wiring harness firmly.
Reconnect battery.
Shift transmission into Reverse (engine off but key ON).
Verify:
Reverse lights turn on
Backup alarm sounds (if equipped)
Backup camera activates (on equipped models)
