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Home >> Suzuki >> 1987 >> Samurai Base >> Repair and Diagnosis >> External Pages >> Different car >> Section 12 (Glass/Windows/Mirrors) >> Diagnostic Information and Procedures >> Automatic Day-Night Mirrors Inoperative >> Circuit/System Testing
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Circuit/System Testing

WARNING: This page is about a different car, the 2007 Suzuki XL7. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the harness connector at the rearview mirror.
  2. Test for less than 1 Ω of resistance between the ground circuit and ground.
    • If greater than 1 Ω, test the ground circuit for an open/high resistance.
  3. Ignition ON, verify that a test lamp illuminates between the voltage supply circuit and ground.
    • If the test lamp does not illuminate, repair the voltage supply circuit for a short to ground or an open/high resistance.
  4. With the transmission in PARK, test for less than 0.5 volts between the backup lamp supply voltage circuit and ground.
    • If the voltage is greater than 0.6 volt, test the backup lamp supply voltage circuit for a short to voltage.
  5. With the transmission in REVERSE, test for greater than 11 volts between the backup lamp supply voltage circuit and ground.
    • If the voltage is not 12 volts, test the backup lamp supply voltage circuit for an open/high resistance.
  6. If all circuits test normal, replace the rearview mirror.
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