B3820

Symptoms

• The left rear window does not go down
• Intermittent operation of the window regulator
• The malfunction indicator on the instrument panel lights up

Causes

• Open or short circuit in wiring harness
• Window lift motor malfunction
• Problems in the power window control unit
• Contact corrosion
• Mechanical obstacles in the window lift mechanism

How to Fix

1. Check the wiring harness for breaks and short circuits
2. Check the window lift motor
3. Inspect contacts for corrosion
4. Check the window lift mechanism for mechanical obstructions.
5. If necessary, replace faulty components

Related codes

Error B3820 by Vehicle Brand