i live in canada where it is law to have headlights to come on at a certain lighting. vettes sold here do not allow you to turn this feature off on dash display. does anyone know how to override this, gets annoying when it is not quite dark and lights pop up, and can not put them down. thanks.

J.D.

 

anyone have any ideas?????

 

There is a resistor mod you can do on the Daylight Sensor located on the left side of the front defroster vent grill. The resistor will prevent the light sensor from triggering the twilight feature.

I expect someone who's done this mod will post the correct resistor value and how to connect it, but my memory says it's an easy fix.

 

Originally posted by forum member QuicksilverC5

Disable the Twilight Sentinel on Canadian Model C5

It turned out to be VERY easy to do. The only minor difficulties I encountered were:
a) due to the limited distance I could pull the sensor and its lead from the wiring harness out to facilitate working on it (about 4"), and
b) the fact that one has to work in fairly close quarters down low at the base of the windshield. To make this easier, I moved the seat(s) as far forward as possible when actually doing the work.

I did it as follows:

1. I used a CREDIT CARD to 'work'/loosen and 'pop out' the dash top defroster grill.

2. The Twilight Sentinel (TS) sensor itself comes in a base/housing that plugs into a female socket on the left hand underside of the defroster grill. It simply screws into its defroster grill socket, requiring only a 1/4 clockwise turn to 'lock' it into place like (eg.) a tail light bulb into its socket.

3. Before I did ANYTHING (even unscrewed the sensor from the grill), I tied some *black* fishing line (about 4 feet worth) around the ACTUAL WIRE connecting the sensor to the harness, ***JUST IN CASE the whole thing should accidentally slip down into the dash during the process***, so I could pull it up again... (THAT WOULD BE A PAIN - the head lights would then ALWAYS be on when the car was running, and trying to fish it out again looked like it would NOT be easy...).

4. I THEN unscrewed the sensor from the defroster grill.

5. THEN, the sensor itself simply plugs into a male connector on the end of the wiring harness lead, so I unplugged the sensor from its harness connector. (I used a small jeweller's screwdriver to release a clip to allow the parts to be separated).

6. I then reinstalled the (now disconnected) sensor back into the defroster grill (for 'looks' only, since it's now non-functional).

7. Next, I bent the leads on a 4.7K OHM ½ Watt resistor that I picked up today (6-pak for $1.49; needed only one), and plugged the resistor leads into the contacts on the end of the male wiring harness connector. (Real nice fit - tight but not too tight).

8. I then taped the resistor/connector up to prevent shorts and provide further insurance against them coming apart, using black electrical tape.

9. I then ***taped the connector to the sensor housing*** , the objective being to help ensure that it wouldn't flop around/rattle/make noise if simply left loose.

10. I then looped and tied the fishing line through a couple of bars in the defroster grill, leaving only about 4" of slack to its tie point back on the wiring harness, and cut off the surplus line with scissors - JUST IN CASE THE ELECTRICAL TAPE SHOULD EVER SOFTEN/COME LOOSE FROM HEAT IN THE CAR and the resistor/lead might decide to separate from the sensor and drop down into the dash as mentioned above and cause noise/be difficult to retrieve.

11. I then reinstalled the defroster grill and 'voila'.
Now *I RULE*.
Base upon admittedly limited testing (since I just finished the job and only tested things out an hour or so ago in my garage), I now (seem to) have TOTAL CONTROL over when I want the headlights up/on or down/off, regardless of ambient light levels.
(***Again, based on my limited testing to date*** - although I simply followed information posted many times on the forum (specifically about the 4.7K ½ Watt resistor) and can't see WHY this 'resistor-subbing' should not work or screw anything ELSE up. As far as the 'computer' knows, it's simply always daylight now...).

Maybe the above will help/encourage others who wish to do the same thing. It only took me 20 minutes or so to do the whole job and I didn't even try to rush.

 

thanks for your time, great info!

 

can you turn this off on a u.s. made car and how ?

 

I think you need to scroll through your DIC and turn of the twilight feature

 

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.