Question about 2002 Cadillac Seville

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Twilight delay pot failure

Codes are interior rheostat failure and twilight delay pot failure

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Posted on Jan 02, 2017

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iambanshee74
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SOURCE: my interior lights and the twilight switch has stoped working

its more than likely the twilight sentinal sensor which is in the dash and would cause this issue. it will be a little blue sensor about the size of a dime under the left hand or possible centre of the dash. happy holidays

Posted on Dec 29, 2009

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1 Answer

How does the twilight sentinel work


What make ,model an year vehicle ? This is for a Cadillac !
Twilight Sentinel
The twilight delay switch in the headlamp switch assembly is supplied a 5 volt reference from the instrument panel integration module (IPM). The IPM also provides ground to the twilight delay switch. The switch is a potentiometer in which the resistance varies as the switch is moved. The IPM receives an input voltage proportional to the resistance of the potentiometer through the twilight delay signal circuit. The IPM sends a class 2 message to the dash integration module (DIM) indicating the on/off status and delay length for the twilight sentinel. With the twilight sentinel switch in any position other than OFF, the DIM will turn the headlamps on or off according to the daytime/nighttime status sent by the IPM. The DIM uses the twilight delay signal in order to keep the headlamps and park lamps on after the ignition switch transitions from ON to OFF during nighttime conditions.
Now ,do you understand ?
Now

May 30, 2016 | Cars & Trucks

1 Answer

The 97 Bonneville. That has. The twilight sentinel feature. The dash. Or cluster does not work none of the int light works and the fog lamp all fuses are goods


Twilight feature is used by the BCM to turn on the headlights when light levels diminish. Dash, cluster lighting is controlled by a rheostat near the headlight switch. The rheostat is rolled up for brighter lights. If this does not work the interior module may have burned out or the rheostat may be bad. If interior lights come on when rheostat is rolled fully up it most likely is OK. Interior lighting module is located above the headlight switch beside the cluster on the left side.

Mar 06, 2016 | Cars & Trucks

1 Answer

Dim head lamps and day light running lamps won't come on my 2000 Buick lasabre


Daytime Running Lamps
With the daytime running lamps (DRL) programmed to be on, the DRL will operate when the ignition switch is in the ON position, the gear selector lever is out of the PARK position, the headlamp switch is in the OFF or PARK position, and the ambient light sensor indicates daytime conditions. Battery positive voltage (B+) is supplied to the DRL relay coil through the underhood fuse block. Battery positive voltage is supplied through the underhood fuse block FOG/DRL Fuse to the DRL relay normally open contact. The DRL relay normally closed contact receives ground for normal high headlamp operation. When the dash integration module (DIM) determines that conditions are right for the DRL, the DIM grounds the DRL relay coil. This energizes the DRL relay coil and closes the switch to the normally open contact. Battery positive voltage (B+) is supplied to the LH and RH high beam headlamps in series. The high beam headlamps split the voltage and each lights at half intensity. Current will follow the path from the DRL relay to the LH high beam headlamp, HDHIBML Fuse, HDHIBMR Fuse, the RH high beam headlamp, then to ground.
Does your vehicle have
Twilight Sentinel
The twilight delay switch in the headlamp switch is supplied a reference voltage from the instrument panel integration module (IPM). It is supplied a reference ground from the IPM. The switch is a potentiometer that resistance varies as the switch is moved. The IPM receives an input voltage proportional to the resistance of the potentiometer. The IPM sends a class 2 message to the dash integration module (DIM) indicating the on/off status and delay length for the twilight sentinel. With the twilight sentinel in an ON position, the DIM will automatically control the headlamps on/off status depending on the nighttime/daytime status of the ambient light sensor. The DIM will use the twilight sentinel delay length to know how long to keep the headlamps and park lamps on after the ignition switch transitions from ON to OFF during nighttime conditions.
If you don't know about these things you best bet is to take it to an ASE certified repair shop or the dealer .
If you
Your best

Nov 30, 2015 | Buick Cars & Trucks

1 Answer

How do I get my interior lights to quite coming on when the car is off?


Oh Miss Luz, there is a reason. Either the interior light button on the door is faulty, possibly the white wire(ground) has come off the button and is touching the body and turning the lights on, or the rheostat that turns them on is at fault and making the connection when your not looking. Either way, you have to have it checked out. Try the rheostat that turns the interior lights on and dims the dash lights when turned to the left. Turn it all the way to the left and leave it that way overnight. If the lights aren't on, you've found the culprit.

Dec 01, 2014 | 1994 Buick Park Avenue

1 Answer

I need to manually turn off the interior lights in a 2000 pontiac bonneville se


You could pull the fuse, but you may loose the memory for the radio.
You could have a time delay module failure.

Jan 05, 2014 | 2000 Pontiac Bonneville

1 Answer

Twilight sentinel will not work; now headlight and tail lights won't come on; interior lights still work with knob. Do you think it is the F-switch? Also, where can I get a schematic of how to ins


It's probably the lighting control module , but without doing some electrical testing that is just a guess !
Battery positive voltage (B+) is applied at all times to the lamp control module (LCM) through the underhood junction block HDLP MaxiFuse® and CKT 1242 (RED).
When you place the headlamp switch in the HEAD position, the headlamps input to the LCM is grounded. The LCM then applies battery positive voltage (B+) through the underhood junction block HDLOBML fuse and HDLOBMR fuse, which feed the left low beam headlamp and the right low beam headlamp respectively. When you activate the headlamp dimmer switch by pulling on the multifunction lever until the switch clicks, CKT 524 (PPL) is grounded to the LCM. The LCM then removes battery positive voltage (B+) from the low beam headlamps and supplies battery positive voltage (B+) through the underhood junction block HDHIBML fuse and HDHIBMR fuse, which feed the left high beam headlamp and the right high beam headlamp respectively.

Twilight Sentinel Circuit Description
Twilight sentinel determines whether the daytime running lamps (DRL), or the exterior lamps and the low beam headlamps at full intensity should be on based upon the signal of the ambient light sensor. When the ambient light sensor detects daytime, the twilight sentinel turns on the DRL. When the ambient light sensor detects darkness, the twilight sentinel turns on the exterior lamps and the low beam headlamps at full intensity. The twilight sentinel also keeps the lamps on for a delay period of 3 to 180 seconds under the following conditions:
• The vehicle is in PARK.
• The ambient light sensor detects darkness.
• The ignition switch is turned to the OFF position.
You may turn off the twilight sentinel manually. When it is dark and the gear selector is in PARK, pushing the twilight sentinel switch to OFF will turn off the headlamps and exterior lamps. Pushing the twilight sentinel switch to OFF again will turn on the headlamps and the exterior lamps. If the gear selector is not in PARK, pushing the twilight sentinel switch will have no effect.
The F- switch is just an input from the LCM - lamp control module .
Do you know how to test control module inputs an outputs ? Very easy to fry a module if you don't know how to do it .
Also have a full scan of all modules on the vehicle , could have DTC'S - diagnostic trouble codes stored . Not for the OBD 2 engine computer . The instrument cluster , BCM , LCM can all set codes too, related to lighting an someother thing's .
ECM Inputs and Outputs Diagnosis

Electric Testing Techniques You Need to Know

You can find free wiring diagrams here http://www.bbbind.com/free_tsb.html Enter vehicle info. year , make , model and engine ! Under system click on lighting ,then under subsystem click headlamps . Click the search button then the blue link . The first diagram you will see at the top the power supply to the LCM , down a little you will see the headlamp switch , ambient light sensor . Now if you want to start replacing thing's without testing good luck !

Jun 02, 2017 | 1997 Buick Park Avenue

1 Answer

Hey, my 1989 cadillac seville has te codes: b120, b121, b122, b441, b552. What do these mean?


b120 121 & 122 are a twilight delay & panel dimming codes. Probably a problem with the switch. b 441 is a cooling fans problem. b 552 is caused when the battery cables have been disconnected or power loss to the ECM. Keep alive memory error.

Aug 29, 2011 | 1991 Cadillac Seville

1 Answer

My interior lights and the twilight switch has stoped working


its more than likely the twilight sentinal sensor which is in the dash and would cause this issue. it will be a little blue sensor about the size of a dime under the left hand or possible centre of the dash. happy holidays

Dec 29, 2009 | 1997 Cadillac DeVille

1 Answer

Hi, i have cadillac sedan deville 1994 , the light sensor always read dark , so the exterior lights always on , besides when i open the door and the interior lights goes on , so the exterior lights goes...


hi
problem solved after cleaning the light sensor but the problem of twilight sentinel always exist , so if the twilight on the way of MAX the lights will remain 90 seconds ON but if i open the door and the interior lights will go on so the exterior lights will go OFF , what might be the problem?

Dec 10, 2008 | 1994 Cadillac DeVille

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