OBD Guide

B3387

Right Front Window Up Switch Circuit Low

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$22–89 (est.)

Symptoms

  • The right front window doesn't work
  • Intermittent operation of the window regulator
  • Switch backlight flashing

Causes

  • Switch failure
  • Open or short circuit in wiring harness
  • Contact corrosion
  • Problems with the power window control unit

How to Fix

  1. Check the switch for mechanical damage
  2. Test the switch circuit with a multimeter
  3. Inspect the wiring harness for damage
  4. Clean contacts from corrosion
  5. If necessary, replace the switch or control unit

Related codes

Error B3387 by Vehicle Brand