B3723

Rear Wiper Relay Drive Circuit High

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

Rear wiper does not work
Rear wiper runs continuously
Rear windshield wiper turns on spontaneously

Causes

Short circuit to positive in the relay circuit
Faulty rear wiper relay
Wiring harness damage
Contact corrosion
Control unit malfunction

How to Fix

Check rear wiper relay
Inspect the wiring harness for damage
Check relay control circuit for short circuit
Clean the contacts and treat them with an anti-corrosion compound
Replace relay or wiring harness if necessary

Related codes

B3722 B3724 B3725