I recently purchased a 2005 Buick Park Avenue Special Edition. Tonight was the first time I've actually driven it in anything except day time. I was expecting the headlights to come on automatically when I started it up. Instead the only thing that came on were the daytime running lights when I put it in gear. I have to manually pull the headlight switch to get the lights to come on.
The twilight sentinel switch is in the max position and I've tried adjusting that to no change. In addition to the twilight sentinel not working, the DIC, radio, and climate control won't dim. From previous experience this means the car thinks it's day time out and it doesn't need to dim them. The only control I have over the brightness of the interior lights is the gauge lighting that I can control by twisting the headlight knob.
Does anyone have any clue as to how to trace this or what may be the issue? Any input would be greatly appreciated. Thanks, Kyle.