Dongfeng KR truck parts right Combination switch assembly 3774030-C5102

Designed to consolidate multiple critical vehicle functions into one intuitive switch, the assembly streamlines driver operation and reduces cockpit clutter. It integrates five core controls: windshield wiper (3 speed settings + intermittent mode), windshield washer (one-touch activation), rear window defroster, right-side mirror adjustment (up/down/left/right), and auxiliary light (fog lamp/hazard light toggle). Each lever features a tactile detent design that provides clear feedback, allowing drivers to operate functions without taking their eyes off the road—critical for heavy-duty truck safety. The mirror adjustment knob uses a precision potentiometer that enables 0.5mm incremental movements, ensuring accurate positioning of the right-side mirror for optimal rear visibility. Unlike separate single-function switches that require reaching across the dashboard, this integrated design puts all essential controls within easy thumb reach of the steering wheel

At the core of the assembly is a high-quality copper-alloy contact system that delivers consistent electrical conductivity for all integrated functions. Each switch contact has a silver-nickel plating (10μm thickness) that reduces contact resistance to ≤30mΩ, minimizing voltage drop and ensuring fast, reliable activation of connected systems (e.g., wiper motor, defroster). The internal circuit board is coated with a 0.2mm conformal epoxy layer that protects components from dust, moisture, and vibration—meeting IP54 ingress protection standards. The assembly undergoes 50,000+ actuation cycle tests (equivalent to 5 years of heavy use) with no contact degradation, and the wiper switch’s intermittent mode timer maintains ±5% accuracy across temperature extremes (-40°C to 85°C). Unlike low-quality switches with inconsistent contact performance, this design guarantees reliable function activation in all driving conditions

Built to withstand the constant vibration of truck steering columns and daily wear, the assembly uses durable materials for long-term reliability. The outer housing is made of flame-retardant PA66-GF30 plastic (30% glass fiber reinforced, UL94 V-0 rating) that tolerates temperature extremes from -40°C to 90°C without warping or cracking. The switch levers are crafted from impact-resistant POM plastic with a textured grip that resists wear and provides non-slip operation, even with gloved hands. The internal spring mechanisms use 304 stainless steel that maintains tension after 100,000+ cycles, preventing lever sag or loose operation. Unlike fragile plastic switches that break under minor impact, this rugged design endures accidental bumps from steering wheel adjustments or driver movement, ensuring functionality for 6+ years

Designed for hassle-free replacement by fleet technicians or DIY owners, the assembly simplifies installation and upkeep. It includes all necessary hardware: 3 M5×12mm stainless steel mounting bolts, lock washers, and a foam gasket that reduces vibration transfer to the steering column. Installation takes 15–20 minutes: remove the steering column cover (2 screws), disconnect the old switch’s 16-pin connector, unbolt the old assembly, align the new switch with the column’s reference marks, secure the bolts (torque to 12 N·m), and reconnect the harness. The assembly requires no post-installation calibration—all functions work with the truck’s existing electrical system immediately. For maintenance, the textured housing wipes clean with a damp cloth (resisting stains from oil or dirt), and the sealed internal components prevent dust ingress, eliminating the need for periodic cleaning. Each unit undergoes electrical performance testing, vibration trials (10–2,000 Hz), and temperature cycling, backed by a 24-month warranty against defects (e.g., contact failure, lever breakage, housing cracking)