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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1065 (Instrument Panel System Displays, Gauges And Console) >> Diagnostic Information and Procedures >> Head Up Display (HUD) Intensity Does Not Vary

Head Up Display (HUD) Intensity Does Not Vary

WARNING: This page is about a different car, the 2004 Pontiac Aztek and 2004 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.
Head Up Display (HUD) Intensity Does Not Vary

Step Action Yes No
Schematic Reference:  Head Up Display Schematics  
1 Did you perform the HUD Diagnostic System Check? Go to Step 2  Go to Diagnostic System Check - Head Up Display 
2
  1. Turn the ignition ON, with the engine OFF.
  2. Adjust the head up display (HUD) dimmer switch from the lowest intensity to the highest intensity.
Does the HUD dim properly?		 Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems Go to Step 3 
3 Move the HUD image up and down.
Does the image move up and down?		 Go to Step 4  Go to Step 6 
4
  1. Turn the ignition OFF.
  2. Disconnect the HUD module.
  3. Turn the ignition ON, with the engine OFF.
  4. Connect a test lamp between the HUD dimmer signal circuit and battery positive voltage.
  5. Adjust the HUD from the lowest intensity to the highest intensity.
Does the test lamp go from full intensity then to full dim?		 Go to Step 7  Go to Step 5 
5 Test the HUD dimmer signal circuit for an open. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 11  Go to Step 8 
6 Test the HUD dimming switch ground circuit for an open. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 11  Go to Step 8 
7 Inspect for poor connections at the harness connector of the HUD. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 11  Go to Step 9 
8 Inspect for poor connections at the harness connector of the HUD dimmer switch. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 11  Go to Step 10 
9 Replace the HUD module. Refer to Head Up Display Replacement .
Did you complete the replacement?		 Go to Step 11  -
10 Replace the HUD dimmer switch. Refer to Head Up Display Switch Replacement (Rendezvous)  or Head Up Display Switch Replacement (Aztek) .
Did you complete the replacement?		 Go to Step 11  -
11 Operate the system in order to verify the repair.
Did you correct the condition?		 System OK Go to Step 2 
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