OBD Guide

B3873

Front Washer Relay Circuit

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$6–33 (est.)

Symptoms

  • Front windshield washer does not work
  • No sound from the washer pump
  • Error message on the dashboard

Causes

  • Front washer relay malfunction
  • Open or short circuit in the circuit
  • Problems with the control unit
  • Contact corrosion
  • Wiring harness damage

How to Fix

  1. Check washer circuit fuse
  2. Check the relay with a multimeter
  3. Inspect the wiring harness for damage
  4. Check contacts for corrosion
  5. Replace relay if necessary
  6. Check the operation of the washer pump

Related codes

Error B3873 by Vehicle Brand