Circuit/System Testing

Ignition OFF and all vehicle systems OFF, disconnect the connector at the appropriate E17 Outside Rearview Mirror Glass:
- E17D Outside Rearview Mirror Glass - Driver = X510
- E17P Outside Rearview Mirror Glass - Passenger = X610
Verify a test lamp illuminates between ground circuit terminal 5 and B+.
- If test lamp does not illuminate
  Repair the open/high resistance on the appropriate circuit or ground connection:
- E17D Outside Rearview Mirror Glass - Driver = Circuit 2150
- E17P Outside Rearview Mirror Glass - Passenger = Circuit 2250
- Go to next step: If the test lamp illuminates
Engine running, connect a test lamp between the control circuit terminal 8 and the ground circuit terminal 5.
Verify the test lamp turns ON when operating the rear defogger switch.
- If the test lamp is always OFF
1. Ignition OFF, remove the test lamp, disconnect the appropriate connector at the S79 Door Switch Panel Control Module:
  - S79D Front Side Door Window Control Switch - Driver = X1 Connector
  - S79P Front Side Door Window Switch - Passenger
2. Test the appropriate circuit for an open/high resistance:
  - S79D Front Side Door Window Control Switch - Driver = Circuit 606
  - S79P Front Side Door Window Switch - Passenger = Circuit 607
  - If an open/high resistance is found, repair the fault on the circuit or ground connection.
  - Go to next step: If an open/high resistance is not found.
3. Replace the appropriate S79 Front Side Door Window Switch.
- Go to next step: If the test lamp turns ON
Test or replace the E17 Outside Rearview Mirror Glass.