Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSBUICK1998LESABRE V6-3.8L VIN KREPAIR AND DIAGNOSISINSTRUMENT PANEL, GAUGES AND WARNING INDICATORSHEADS UP DISPLAY UNITDESCRIPTION AND OPERATIONHUD IMAGE INTENSITY CONTROL
1998 Buick LeSabre V6-3.8L VIN K
HUD Image Intensity Control
1998 Buick LeSabre V6-3.8L VIN KSECTION HUD Image Intensity Control
The Head Up Display (HUD) control module monitors CKT 717 (WHT) at terminal 3 to determine the image intensity. When the HUD control switch is ON, the DIM to BRIGHT switch varies the voltage at terminal 7 of the MUD control switch. when the HUD control module detects that the park lights are off (CKT 32, YEL), the HUD control module uses the input at terminal 3 to adjust the image intensity to the desired level. When the MUD control switch is OFF, terminal 7 is connected to ground at terminal 10 (CKT 251, BLK/WHT) of the MUD control switch. When the MUD control module detects a low (ground) condition at terminal 3 (CKT 717, WHT) the HUD image turns OFF.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.