B0284

Electric Rear Defrost Circuit Range/Performance

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$11–56 (est.)

Symptoms

Rear defogger does not work
Rear window defogger is unstable
The heated glass indicator does not light up

Causes

Broken or damaged heating element
Rear heating relay malfunction
Problems with wiring or connectors
Contact corrosion
Control unit malfunction

How to Fix

Check the integrity of the heating element
Check heating circuit relays and fuses
Inspect wiring and connectors for damage and corrosion
Check the operation of the control unit
Replace faulty components

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