Help...
Thread Starter
Team Owner
Joined: Apr 2005
Posts: 23,900
Likes: 218
From: Foxtrot Delta Tango
Help...
Went out to start the car this a.m. Had dash lights until I started the car then no dash lights....Turned on headlights....worked..but won't retract....and now noticed no taillights or license plate lights...Do have brake lights....No side marker lights.....I'm thinking multi function switch....but it was replaced two years ago.....
Tech Contributor
Joined: Jan 2007
Posts: 19,246
Likes: 1,092
From: Dyer, IN
Went out to start the car this a.m. Had dash lights until I started the car then no dash lights....Turned on headlights....worked..but won't retract....and now noticed no taillights or license plate lights...Do have brake lights....No side marker lights.....I'm thinking multi function switch....but it was replaced two years ago.....
Thread Starter
Team Owner
Joined: Apr 2005
Posts: 23,900
Likes: 218
From: Foxtrot Delta Tango
No ..I have HUD displaying and memory seat functions working...I have no taillights...no side marker lights...no license plate or back up lights..no dash lights . Headlights and brake lights work but headlights will not go down when lights are turned off or when key taken out of ignition switch. Same symptoms, except for the headlights, that I had 2 years ago when the multi function switch was replaced...just can't believe that the switch would be bad again...this car isn't a daily driver, the switch doesn't get used enough to be worn out in 2 years.
Tech Contributor
Joined: Jan 2007
Posts: 19,246
Likes: 1,092
From: Dyer, IN
No ..I have HUD displaying and memory seat functions working...I have no taillights...no side marker lights...no license plate or back up lights..no dash lights . Headlights and brake lights work but headlights will not go down when lights are turned off or when key taken out of ignition switch. Same symptoms, except for the headlights, that I had 2 years ago when the multi function switch was replaced...just can't believe that the switch would be bad again...this car isn't a daily driver, the switch doesn't get used enough to be worn out in 2 years.
Thread Starter
Team Owner
Joined: Apr 2005
Posts: 23,900
Likes: 218
From: Foxtrot Delta Tango
The reason I asked is.....the twilight sentinel has been included in all the C5's (I've seen to date, including mine), that have HUD and memory seat options. Please check the options in the DIC....this is a good way to troubleshoot this type of problem, because the twilight feature bypasses the MFS.
I've got a 99 with Hud and Memory Seats...but no T82.
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Tech Contributor
Joined: Jan 2007
Posts: 19,246
Likes: 1,092
From: Dyer, IN
) It basically operates from the ambient light sensor, which is located on the right side of the front defrost grill. It looks like a small black bulb. When the twilight option in turned on in the DIC, it will automatically control the lighting based on conditions. The nice thing about having it, is it bypasses the MFS, so even if the switch goes bad(provided it does not short internally), all your lights will function at night....i.e instruments, headlights/doors, markers, etc.