Head Up Display (HUD) Image Adjustment Inoperative. Buick Park Avenue 2003

For 1990-2009 cars only

Makes 🢒 Buick 🢒 2003 🢒 Park Avenue 🢒 Body and Accessories 🢒 Instrument Panel, Gages, and Console 🢒 Head Up Display (HUD) Image Adjustment Inoperative

Step	Action	Yes	No
Schematic Reference: Head Up Display Schematics
1	Did you perform the Instrument Cluster Diagnostic System Check?	Go to Step 2	Go to Diagnostic System Check - Instrument Cluster
2	Adjust the intensity of the HUD using the HUD dimmer switch. Does the intensity of the HUD vary?	Go to Step 3	Go to Head Up Display (HUD) Intensity Does Not Vary
3	Turn the ignition ON with the engine OFF. Adjust the head up display (HUD) up then down with the HUD up/down switch. Does the HUD display adjust properly?	Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems	Go to Step 4
4	Turn the ignition. OFF Disconnect the HUD module. Connect a test lamp between the up control circuit at the HUD module and a good ground. Refer to Circuit Testing in Wiring Systems. Turn the ignition ON, with the engine OFF. Move the HUD up/down switch to the UP position. Does the test lamp illuminate?	Go to Step 5	Go to Step 6
5	Connect a test lamp between the down control circuit at the HUD module and a good ground. Refer to Circuit Testing in Wiring Systems. Move the HUD up/down switch to the Down position. Does the test lamp illuminate?	Go to Step 9	Go to Step 7
6	Test the HUD up control circuit for an open or for high resistance. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 12	Go to Step 8
7	Test the HUD down control circuit for an open or for high resistance. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 12	Go to Step 8
8	Inspect for poor connections at the harness connector of the HUD 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 12	Go to Step 10
9	Inspect for poor connections at the harness connector of the HUD module. 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 12	Go to Step 11
10	Replace the HUD switch. Refer to Head Up Display Switch Replacement . Did you complete the replacement?	Go to Step 12	--
11	Replace the HUD module. Refer to Head Up Display Module Replacement . 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