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Function Test: Defogger

  1. 9. Connect the No. 1 and No. 8 terminals with a jumper wire, and check for voltage between the No. 1 terminal of the mirror connector and body ground. There should be battery voltage and both mirrors should warm up with the ignition switch ON (II).
    • If there is no voltage or neither warms up, check for:
      • An open in the BLK/YEL, BLK, or ORN wire.
      • Blown No. 14 (10 A) fuse in the under-dash fuse/relay box.
      • Poor ground (G401, G402).
    • If only one fails to warm up, check its defogger.
    • If both warm up, check the defogger switch.