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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1407 (Door System, Mirror System & Window System) >> Diagnostic Information and Procedures >> Heated Mirrors Inoperative

Heated Mirrors Inoperative

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2004 Oldsmobile Bravada, 2004 GMC Envoy XUV, 2004 GMC Envoy XL, 2004 GMC Envoy, and 2004 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
Heated Mirrors Inoperative

Step Action Yes No
Schematic Reference:  Outside Mirror Schematics  
Connector End View Reference:  Power Door Systems Connector End Views  
1 Did you perform the Door Systems Diagnostic System Check? Go to Step 2  Go to Diagnostic System Check - Door Systems 
2 Verify the heated mirrors inoperative fault is present.
Do the heated mirrors operate normally?
Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems Go to Step 3 
3 Does the rear window defogger operate properly? Go to Step 4  Go to Symptoms - Stationary Windows
4
  1. Remove the appropriate mirror face. Refer to Mirror Face Replacement .
  2. Start the engine.
  3. Connect a test lamp between the circuits of the appropriate mirror face.
  4. Activate the rear window defogger switch.
Does the test lamp illuminate?
Go to Step 6  Go to Step 5 
5
  1. Disconnect the appropriate mirror from the door module.
  2. Connect a test lamp between the mirror heater control and the mirror heater ground circuit pins of the appropriate door module.
  3. Activate the rear window defogger switch.
Does the test lamp illuminate?
Go to Step 7  Go to Step 8 
6 Inspect for poor connections at the harness connector of the outside rearview mirror face. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.
Did you find and correct the condition?
Go to Step 12  Go to Step 9 
7 Inspect for poor connections at the harness connector of the outside rearview mirror. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.
Did you find and correct the condition?
Go to Step 12  Go to Step 10 
8 Inspect for poor connections at the harness connector of the appropriate door module. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.
Did you find and correct the condition?
Go to Step 12  Go to Step 11 
9 Replace the appropriate outside rearview mirror face. Refer to Mirror Face Replacement .
Did you complete the replacement?
Go to Step 12  -
10 Replace the appropriate outside rearview mirror. Refer to Mirror Replacement .
Did you complete the replacement?
Go to Step 12  -
11
IMPORTANT: Perform the set up procedure for the appropriate door module. Refer to Service Programming System (SPS) in Programming.
Replace the appropriate door module. Refer to Switch Replacement - Door Lock and Side Window - Driver  or Switch Replacement - Door Lock and Side Window - Passenger .Did you complete the replacement?
Go to Step 12  -
12 Operate the system in order to verify the repair.
Did you correct the condition?
System OK Go to Step 2