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Home >> Ford >> 1980 >> Fiesta >> Repair and Diagnosis >> Electrical >> Body Electrical >> Defoggers - Rear Window >> Testing >> Relay/Timer >> All Other Models

All Other Models

  1. Ground the relay case and connect a jumper wire between pins 1 and 2. Connect a test lamp between pin 3 and ground.
  2. Connect power to pin 2. The test lamp should not light. Short between terminals 2 and 4 momentarily. The lamp should light and remain lit after short is removed. On Granada, Monarch, Pinto, and Bobcat models, the light should remain on until power is disconnected. On oil other models, the light will shut off after 10 minutes, or when power is disconnected.
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