Test E: The Heated Exterior Mirror Does Not Defrost

PINPOINT TEST E: THE HEATED EXTERIOR MIRROR DOES NOT DEFROST

E1-E2:

E2-E4:

E4-E5:

Normal Operation
When the rear window defrost is ON, the heated exterior mirrors receive voltage from the rear window defrost relay through circuit 59 (DG/VT) and ground through circuit 57 (BK).

Possible Causes
- circuit 57 (BK) open
- circuit 59 (DG/VT) open
- exterior mirror glass
- rear window defrost system
- smart junction box (SJB)