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 Write-Up: Replacing Twilight Sentinel Photo Cell

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BMD
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Write-Up: Replacing Twilight Sentinel Photo Cell - Page 3 Empty
PostSubject: Re: Write-Up: Replacing Twilight Sentinel Photo Cell   Write-Up: Replacing Twilight Sentinel Photo Cell - Page 3 EmptyWed Oct 06, 2010 11:43 pm

Good to know. Great question and info! Are Ambient Light Sensors available?
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IBx1
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PostSubject: Re: Write-Up: Replacing Twilight Sentinel Photo Cell   Write-Up: Replacing Twilight Sentinel Photo Cell - Page 3 EmptyThu Oct 07, 2010 12:14 am

If you have the light switch pulled out, will the lights cut out like that? Or is it just when you have the Twilight Sentinel feature enabled only, with the light switch pushed in? I'd hope it's just the 2nd case.
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MTRiviera
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PostSubject: Re: Write-Up: Replacing Twilight Sentinel Photo Cell   Write-Up: Replacing Twilight Sentinel Photo Cell - Page 3 EmptyThu Oct 07, 2010 12:26 am

IBx1, 2nd case.
Rick
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albertj
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PostSubject: Re: Write-Up: Replacing Twilight Sentinel Photo Cell   Write-Up: Replacing Twilight Sentinel Photo Cell - Page 3 EmptyThu Oct 07, 2010 12:29 am

BMD wrote:
Good to know. Great question and info! Are Ambient Light Sensors available?

...last I checked they were, which makes sense as they are used in many GM cars and have been since the '90s. An FSM helps for R&R but it's not difficult - the moderator moved this post, look backwards and you will find the write-up.

In the meantime remember to use the light switch... if you have to replace the lighting control module, should be able to get a good one from a junkyard (try moradpartscompany.com) for low price.

Albertj


Last edited by albertj on Thu Oct 07, 2010 12:15 pm; edited 1 time in total (Reason for editing : moderator moved the post.)
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PostSubject: Re: Write-Up: Replacing Twilight Sentinel Photo Cell   Write-Up: Replacing Twilight Sentinel Photo Cell - Page 3 EmptyThu Oct 07, 2010 10:16 am

MTRiviera wrote:
Abaddon, if it is the culprit, what does the r&r entail?

The repair procedure simply states that the Sensor twists out counter-clockwise, kinda like a headlight bulb. It's just a twist-lock socket. Unplug the connector....reverse procedure.

The GM P/N is 914032. Lists as about $60. The P/N may have been updated by now, but any dealer parts guy can help you with that.
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PostSubject: Re: Write-Up: Replacing Twilight Sentinel Photo Cell   Write-Up: Replacing Twilight Sentinel Photo Cell - Page 3 EmptyThu Oct 07, 2010 4:42 pm

I just replaced mine last year, available from the dealer (recommend an on-line dealer for best price, like monsterpartsonline.com). The installation was easier than I thought it would be. The sensor doesn't unplug when you twist it out like I was expecting - once you have brought the sensor up out of it's socket, it unplugs and plugs in like a little 194 light bulb. I was looking for a plug on the wires... not there!
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MTRiviera
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PostSubject: Re: Write-Up: Replacing Twilight Sentinel Photo Cell   Write-Up: Replacing Twilight Sentinel Photo Cell - Page 3 EmptyThu Oct 07, 2010 7:52 pm

Great info! I will give this a try and hope that it cures my head light issues.
Regards
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Write-Up: Replacing Twilight Sentinel Photo Cell - Page 3 Empty
PostSubject: Re: Write-Up: Replacing Twilight Sentinel Photo Cell   Write-Up: Replacing Twilight Sentinel Photo Cell - Page 3 EmptyFri Oct 08, 2010 4:00 am

Abaddon wrote:
MTRiviera wrote:
Abaddon, if it is the culprit, what does the r&r entail?

The repair procedure simply states that the Sensor twists out counter-clockwise, kinda like a headlight bulb. It's just a twist-lock socket. Unplug the connector....reverse procedure.

Ahhhh... That would explain why Rivlanta broke his old one at the top of the page.
(Though I gotta' wonder how the hell you're supposed to get a grip on it that close to the windshield.)
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Rivlanta
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PostSubject: Re: Write-Up: Replacing Twilight Sentinel Photo Cell   Write-Up: Replacing Twilight Sentinel Photo Cell - Page 3 EmptyFri Oct 08, 2010 3:07 pm

Well, actually no, I knew it didn't twist from the prior posts. It just broke when I lifted up on it with the needle nose pliers. It was very brittle so that's why I suggest you lift very carefully.

It is a tight squeeze, but do-able.
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Write-Up: Replacing Twilight Sentinel Photo Cell - Page 3 Empty
PostSubject: Re: Write-Up: Replacing Twilight Sentinel Photo Cell   Write-Up: Replacing Twilight Sentinel Photo Cell - Page 3 EmptyFri Oct 08, 2010 5:20 pm

I understand that the sensor plugs straight into the socket, like a 194 bulb, but also like a 194 bulb
the socket has a quarter-turn mount to the grillwork.
I just looked it up, and the factory instructions are to pop out the defroster grill, unscrew the socket
& push it through, and then remove/replace the sensor...

Specifically, the assembly instructions read:

# Partially install the sensor.
# Connect the electrical connector.
# Install the sensor to the defroster grille.
# Turn the sensor a quarter turn in order to secure.
# Install the defroster grille.
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PostSubject: Re: Write-Up: Replacing Twilight Sentinel Photo Cell   Write-Up: Replacing Twilight Sentinel Photo Cell - Page 3 EmptyThu Aug 09, 2012 12:16 pm

this might already be asked. I'm ordering a new sentinel...but what are the two black bulb like projections on the dash there...both sides????

Gracias!
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AA
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PostSubject: Re: Write-Up: Replacing Twilight Sentinel Photo Cell   Write-Up: Replacing Twilight Sentinel Photo Cell - Page 3 EmptyThu Aug 09, 2012 12:58 pm

I think these are photocells as well, but they connect to the HVAC system, to control how much air is routed to each side of the car. My parts list says they are: GM #16146093 "Sun Load Temp Sensor"

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Natesriv
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PostSubject: Re: Write-Up: Replacing Twilight Sentinel Photo Cell   Write-Up: Replacing Twilight Sentinel Photo Cell - Page 3 EmptyThu Aug 09, 2012 4:16 pm

weird...well I guess they work as I'm cold all over the car now!
Thanks!
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llamalor2112
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PostSubject: Re: Write-Up: Replacing Twilight Sentinel Photo Cell   Write-Up: Replacing Twilight Sentinel Photo Cell - Page 3 EmptyThu Oct 18, 2012 1:42 am

There seems to be a lot of back and forth regarding whether or not you pry out or need to give the sensor a twist when removing it. What's the real census on that?
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PostSubject: Re: Write-Up: Replacing Twilight Sentinel Photo Cell   Write-Up: Replacing Twilight Sentinel Photo Cell - Page 3 EmptyThu Oct 18, 2012 10:03 pm

I just changed mine. It pops out. No twist at all. It's like a side marker light...just pushes into the socket. No twisting at all...


Last edited by Natesriv on Thu Oct 18, 2012 10:07 pm; edited 1 time in total
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PostSubject: Re: Write-Up: Replacing Twilight Sentinel Photo Cell   Write-Up: Replacing Twilight Sentinel Photo Cell - Page 3 EmptyThu Oct 18, 2012 10:05 pm

oops,posted twice smile
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PostSubject: Re: Write-Up: Replacing Twilight Sentinel Photo Cell   Write-Up: Replacing Twilight Sentinel Photo Cell - Page 3 EmptyFri Oct 19, 2012 2:33 am

Twice the reassurance razz haha thanks!!
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PostSubject: Re: Write-Up: Replacing Twilight Sentinel Photo Cell   Write-Up: Replacing Twilight Sentinel Photo Cell - Page 3 EmptyThu Jan 10, 2013 10:36 pm

Lemme just say it was easier to change the rear plugs in this car than to change this sensor. In fact, the half broken one is still stuck in the dash right now. Will have to just remove the upper dash and defrost grill to even get at it I suppose... mad why always the designs for people with 4 year old's hands and 4 foot long arms?
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PostSubject: Re: Write-Up: Replacing Twilight Sentinel Photo Cell   Write-Up: Replacing Twilight Sentinel Photo Cell - Page 3 EmptyFri Jan 11, 2013 2:01 pm

llamalor2112 wrote:
Lemme just say it was easier to change the rear plugs in this car than to change this sensor. In fact, the half broken one is still stuck in the dash right now. Will have to just remove the upper dash and defrost grill to even get at it I suppose... mad why always the designs for people with 4 year old's hands and 4 foot long arms?


Let's just say replacement was not expected to be frequent... this is the same car, mind you, on which you have to remove the entire rear sweepspear (taillight housing) in order to replace a bulb. And don't even start in on the headlights...
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PostSubject: Re: Write-Up: Replacing Twilight Sentinel Photo Cell   Write-Up: Replacing Twilight Sentinel Photo Cell - Page 3 EmptyFri Jan 11, 2013 4:25 pm

I know what you mean. At least those pieces are accessible via fasteners, if not awkward ones. The ones I hate are the parking lights, when one goes out I have to buy a new set of well trim clips because the old ones don't like to hold as strong the second time! Haha It's like everything else on nicer buicks, planned obsolescence of parts to ensure return to the dealership under warranty instead of outside practices. That's been what I can gather. I don't imagine I'll need t o change the twilight sentinel for a good while at least though. I just get so frustrated with tight spaces like that rolleyes
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Write-Up: Replacing Twilight Sentinel Photo Cell - Page 3 Empty
PostSubject: Re: Write-Up: Replacing Twilight Sentinel Photo Cell   Write-Up: Replacing Twilight Sentinel Photo Cell - Page 3 EmptySun Aug 04, 2013 10:16 pm

I just replaced mine in my '97 Riv.  Did all that stuff including removing the metal grill and A pillar trim - unnecessary.  The cell itself can be carefully pried straight up with a dental tool or other small strong lever tool.  The bottom is a bayonet shape with two wires wrapping down the bayonet that engage the female socket in the metal grill.  It can go in either way right to left or 180 degrees rotated.  The cell itself sits under the plastic bayonet hat so that is what can crack if it is brittle from sun exposure.  You can also test it with an ohm meter once out to ensure it is the culprit - not the Lamp Control Module or the headlight switch.
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PostSubject: Re: Write-Up: Replacing Twilight Sentinel Photo Cell   Write-Up: Replacing Twilight Sentinel Photo Cell - Page 3 EmptyFri Jun 13, 2014 3:48 pm

Noticed my lights clicking on and off recently. Read through this thread (Great info as always). First I tried covering photocell, and lights stayed on constant. Then I removed cover, and lights started clicking on and off again. Was thinking maybe the photocell was dirty??? Used a few cotton swabs dipped in alcohol, and lightly rubbed the photocell. First couple swabs got kinda yellow-brown. Repeated several times until swabs stayed clean, and let dry. Then put the cover on and off to check again. Seems to have fixed the problem, time will tell though  wink  ...................
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