I have to turn off the car and re-start it!
Twilight Sentinal Problems
Thread Starter
Melting Slicks
Joined: Mar 2003
Posts: 2,015
Likes: 1
From: Deerfield beach Fl
Twilight Sentinal Problems
I'm having a problem with the Twilight Sentinal feature. When I start from a dark location such as my garage in the morning, the headlights go on and then once I've driven on the street for a bit while it is light, the headlights will go off as they should. But when driving home at night as it starts to get dark, the headlights will not turn on. I tried this two nights in a row and both times the headlights would not go up. I tried turning the Twilight feature on and off and the headlights wouldn't move. I finally turned the car off and restarted it and then the headlights popped up automatically. I then tried turning the Twilight feature on and off and the headlights would go down when I turned it off and up when I turned it on so it was working correctly. The feature only seems to be working when I start the car. The delay is set to zero. Has anyone had a problem like this or know where I can start troubleshooting?
Racer
Joined: Jun 2001
Posts: 462
Likes: 0
From: Scottsville KY
Originally Posted by robl45
I'm having a problem with the Twilight Sentinal feature. When I start from a dark location such as my garage in the morning, the headlights go on and then once I've driven on the street for a bit while it is light, the headlights will go off as they should. But when driving home at night as it starts to get dark, the headlights will not turn on. I tried this two nights in a row and both times the headlights would not go up. I tried turning the Twilight feature on and off and the headlights wouldn't move. I finally turned the car off and restarted it and then the headlights popped up automatically. I then tried turning the Twilight feature on and off and the headlights would go down when I turned it off and up when I turned it on so it was working correctly. The feature only seems to be working when I start the car. The delay is set to zero. Has anyone had a problem like this or know where I can start troubleshooting?
Gary
Thread Starter
Melting Slicks
Joined: Mar 2003
Posts: 2,015
Likes: 1
From: Deerfield beach Fl
Where is the light sensor, I see two things on the top center of the dash that look like they could be the light sensor. I don't think it can be the light sensor as it works when I start but doesn't seem to recognize it getting dark without a restart.
Racer
Joined: Jun 2001
Posts: 462
Likes: 0
From: Scottsville KY
Originally Posted by robl45
Where is the light sensor, I see two things on the top center of the dash that look like they could be the light sensor. I don't think it can be the light sensor as it works when I start but doesn't seem to recognize it getting dark without a restart.
I just put one in my car while I was doing HUD, so I am not sure if I got a bad sensor, or if it is something else like a relay.
Gary
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
2027 Corvette vs The World: Every Model vs Closest Competitor
Joe Kucinski
10 Most Common Corvette Problems of the Last 20 Years!
Joe Kucinski
5 MOST and 5 LEAST Popular Corvette Model Years in History!
Joe Kucinski
2027 Corvette Buyer's Guide: Everything You Need to Know!
Joe Kucinski
10 Things C8 Corvette Owners Hate (But Won't Tell You)
Joe Kucinski
10 Best Corvettes Coming to Barrett-Jackson Palm Beach 2026!
Brett Foote
Every Corvette Grand Sport Explained! (C2, C4, C6, C7, & C8)
Joe Kucinski
Grand Sport & Grand Sport X Launch Alongside All-New 535hp LS6 V8!
Michael S. Palmer
5 Reasons Bad Drivers Crash & 5 Ways to Avoid a Costly Mistake!
Joe Kucinski
Pro
Joined: Nov 2004
Posts: 528
Likes: 0
From: Thousand Oaks CA
Originally Posted by Das Vett
The ambient light sensor is in the defroster grill on the drivers side. Take a small screw driver and pop up the grill. The sensor has a twist lock into the grill, so unscrew it and unplug the wire harness to replace.
I just put one in my car while I was doing HUD, so I am not sure if I got a bad sensor, or if it is something else like a relay.
Gary
I just put one in my car while I was doing HUD, so I am not sure if I got a bad sensor, or if it is something else like a relay.
Gary
How much does just the Sensor cost???
Racer
Joined: Oct 2001
Posts: 255
Likes: 0
From: Helena, AL
I was having some similiar screwy things going on with mine. Sometimes it would work, sometimes not. It was the battery. My positive cable was about an 1/8 turn loose. Tightened it up and it has been fine ever since.
Thread Starter
Melting Slicks
Joined: Mar 2003
Posts: 2,015
Likes: 1
From: Deerfield beach Fl
I just tried mine, very strange to say the least. It will sense when it is dark, and turn the headlights on, but only on startup, other than that, no way no how will it pop the lights, has anyone had this problem? The sensor seems to be working, it seems to be somewhere down the chain that is screwy.
Pro
Joined: Nov 2004
Posts: 528
Likes: 0
From: Thousand Oaks CA
Originally Posted by Das Vett
The ambient light sensor is in the defroster grill on the drivers side. Take a small screw driver and pop up the grill. The sensor has a twist lock into the grill, so unscrew it and unplug the wire harness to replace.
I just put one in my car while I was doing HUD, so I am not sure if I got a bad sensor, or if it is something else like a relay.
Gary
I just put one in my car while I was doing HUD, so I am not sure if I got a bad sensor, or if it is something else like a relay.
Gary
Pro
Joined: Nov 2004
Posts: 528
Likes: 0
From: Thousand Oaks CA
Originally Posted by Das Vett
For my 99, the part number is 12450121. I assume that all years use the same part, but don't know for sure.
Gary
Gary
good number for my year as well, I will have in by the weekend, hope it fixes the issues! Thanks!
Last edited by Vette 4 Fun; Dec 14, 2004 at 08:50 PM.
Pro
Joined: Nov 2004
Posts: 528
Likes: 0
From: Thousand Oaks CA
Originally Posted by Rob P
How do you turn the twilight on and off? I tried various things and it just remains on.
Per Patchs thread: Twilight (Optional in United States, Standard in Canada)
Press the OPTIONS button until TWILIGHT - OFF
appears on the display, then use the RESET button to
page through the following selections:
TWILIGHT - ON
TWILIGHT - OFF
If you choose TWILIGHT - ON, press the OPTIONS
button again to display DELAY TIME 1 2 in the DIC.
Use the OPTIONS button to switch between delay time
1 and 2. You can increase the delay time by pressing
button 1 (1 FUEL) or decrease the time by pressing
button 2 (2 GAGES). Each bar is equal to 12 seconds.
Pro
Joined: Nov 2004
Posts: 528
Likes: 0
From: Thousand Oaks CA
I needed a new battery anyway (old acid type 
) so I put new red top in and now the lights work fine. Never would have belived that the battery was the cause... we will see if it stays fix, I have new senser in hand just in case 
) so I put new red top in and now the lights work fine. Never would have belived that the battery was the cause... we will see if it stays fix, I have new senser in hand just in case
