1993 Pontiac Bonneville Owner's Manual - Page 119
1993 Pontiac Bonneville Manual
Page 119 highlights
Care of the Head-Up Display Clean the inside of the windshield as If You Can't See the HUD Image needed to remove any dirt or film that When the Ignitionis On: reduces the sharpness or clarity of the Is anything covering the HUD unit? HUD image. Is the HUD dimmer control far To Clean theHUD: enough up? Spray household glass cleaner on a soft, Is the HUD image adjustedto the clean cloth. Wipe the HUD lens gently, proper height? then dry it. Do not spray cleaner Still no HUD image? Check the fuse directly on the lens, because the cleaner Idx in the fuse panel. See the ne under fluid could leak inside the unit if you do. Fuses & Circuit Breakers. Ifthe HUD Image is Not Clear: It could be too bright. Slide the HUD dimmer control further downward. You may need to clean the windshield and HUD lens. Your windshield is part of the HUD system. If you ever have to have a new windshield, be sure to get one designed for HUD. If you don't, the HUD image may look blurred and out of focus.