Four Wheel Drive (4WD) Low Switch Circuit Low
Voltage on the 4WD-Low switch line is below the expected window. Usually a short to ground or a stuck-closed switch.
Affected components
- Four wd low switch
- Wiring harness
Common causes
- High likelihood: Switch wire shorted to ground
- Medium likelihood: Switch stuck in closed position
- Low likelihood: Connector pins corroded - high contact resistance
Diagnostic notes
- The malfunction indicator lamp may illuminate
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.