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supplied through the Driver/Passenger Mirror Motor Right/Down Motors Common circuit. On vehicles equipped with RPO DL3/DR4, the Driver Door Switch (DDS) and Passenger Door Reference Information Schematic Reference Outside Rearview Mirror Schematics Connector End View Reference Component Connector End Views Description and Operation Outside Mirror Description and Operation (Heated Mirrors) or Outside Mirror Electrical Information Reference Circuit Testing Connector Repairs Testing for Intermittent Conditions and Poor Connections Wiring Repairs Circuit/System Verification 1. Ignition ON, observe the scan tool Mirror Select Switch parameter while cycling the mirror select switch between the left and right positions. The parameter should change between If the parameter does not cycle between the specified values, replace the DDS. 2. Observe the scan tool Mirror Motor parameter while cycling the mirror directional switch between the up, down, left and right positions. The parameter should change between Idle,
2008 Chevrolet Silverado 1500 2008 ACCESSORIES & EQUIPMENT Mirrors - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
If the parameter does not cycle between the specified values, replace the DDS. 3. Verify the vehicle is equipped with RPO DL3/DR4. If the vehicle is not equipped with RPO DL3/DR4, refer to Mirror Motor Circuit 4. Observe the scan tool Mirror Horizontal Position and Mirror Vertical Position parameters. The reading should be between 0.2 volts and 4.8 volts and change as the mirror is moved, If not within the specified range or the parameter does not change as the mirror is 5. Command the left and right outside mirror to move up, down, left and right using the mirror directional switch. The mirrors should move in the commanded direction. If either mirror does not move in all commanded directions, refer to Mirror Motor Circuit/System Testing Mirror Motor Circuit Malfunction 1. Ignition OFF, disconnect the harness connector X3 at the appropriate door switch. 2. Ignition ON, verify a test lamp does not illuminate between the following control circuit terminals and ground: Control circuit terminal 1 Control circuit terminal 2 Control circuit terminal 6 If the test lamp illuminates, test the appropriate control circuit for a short to voltage. 3. Ignition OFF, test for infinite resistance between the following control circuits and ground: Control circuit terminal 1 Control circuit terminal 2 Control circuit terminal 6 If less the specified value, test the appropriate control circuit for a short to ground. 4. Test for 40-100 ohms of resistance between the control circuit terminal 1 and the control circuit terminal 6. If not within the specified range, test both control circuits for an open/high resistance. 5. Test for 40-100 ohms of resistance between the control circuit terminal 2 and the control circuit terminal 6.
2008 Chevrolet Silverado 1500 2008 ACCESSORIES & EQUIPMENT Mirrors - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
If not within the specified range, test both control circuits for an open/high resistance. 6. If all circuits test normal, replace the appropriate door switch. Mirror Position Sensor Circuit Malfunction 1. Ignition OFF, disconnect the harness connector X7 at the appropriate door switch. 2. Ignition ON, verify a test lamp does not illuminate between the following circuit terminals and ground: 5-volt reference circuit terminal 7 Signal circuit terminal 4 Signal circuit terminal 5 Low reference circuit terminal 10 If the test lamp illuminates, test the appropriate circuit for a short to voltage. 3. Ignition OFF, test for infinite resistance between the following circuits and ground: 5-volt reference circuit terminal 7 Signal circuit terminal 4 Signal circuit terminal 5 Low reference circuit terminal 10 If less than the specified value, test the appropriate circuit for a short to ground. 4. Test for 4K-7K ohms of resistance between the 5-volt reference circuit terminal 7 and the low reference circuit terminal 10. If not within the specified range, test the 5-volt reference circuit and the low reference 5. Test for 1K-7K ohms of resistance between the 5-volt reference circuit terminal 7 and the signal circuit terminal 4. If not within the specified range, test the signal circuit for an open/high resistance. If 6. Test for 1K-7K ohms of resistance between the 5-volt reference circuit terminal 7 and the signal circuit terminal 5. If not within the specified range, test the signal circuit for an open/high resistance. If 7. If all circuits test normal, replace the appropriate door switch. Repair Procedures
2008 Chevrolet Silverado 1500 2008 ACCESSORIES & EQUIPMENT Mirrors - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Perform the Diagnostic Repair Verification after completing the diagnostic procedure. Outside Rearview Mirror Motor Replacement Control Module References for DDS or PDS replacement, setup, and programming REPAIR INSTRUCTIONS POWER MIRROR SWITCH REPLACEMENT (WITH DL8 AND WITHOUT SLT) Fig. 6: Power Mirror Switch (with DL8 and without SLT)
2008 Chevrolet Silverado 1500 2008 ACCESSORIES & EQUIPMENT Mirrors - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
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