LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Cadillac >> 2007 >> Escalade EXT >> Repair and Diagnosis >> External Pages >> Different car >> Section 1038 (Cellular System, Entertainment System, And Navigation System) >> Diagnostic Information and Procedures >> DTC B2476 or B2482 >> Component Testing
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Component Testing

WARNING: This page is about a different car, the 2008 GMC Sierra, 2008 GMC Cab & Chassis Sierra, 2008 Chevrolet Silverado, and 2008 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the harness connector at the inside rearview mirror.
  2. Test for infinite resistance between the keypad supply voltage terminal 12 and the keypad signal terminal 11.
    • If less than the specified range, replace the inside rearview mirror.
  3. Test for 1.4k-1.6k ohms between the keypad supply voltage terminal 12 and the keypad signal terminal 11 while pressing the black phone button.
    • If not within the specified range, replace the inside rearview mirror.
  4. Test for 2.7k-3.3k ohms between the keypad supply voltage terminal 12 and the keypad signal terminal 11 while pressing the blue On-Star® button.
    • If not within the specified range, replace the inside rearview mirror.
  5. Test for 11.7k-14.3k ohms between the keypad supply voltage terminal 12 and the keypad signal terminal 11 while pressing the red emergency button.
    • If not within the specified range, replace the inside rearview mirror.
scientia non olet · About LEMON Manuals