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Twilight Sentinel Switch (Dash Rotary Dial)

This category on the website [ Switches and Wiring ] we are giving you all of the information related to the individual switches in the Buick Turbo Regal, along with the associated wiring, connector plugs, etc.

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VEHICLE APPLICATION:

Buick Regal, T-Type, Turbo T, Limited, Grand National, GNX

SWITCH NAME:

Twilight Sentinel Switch

PURPOSE OF SWITCH:

TURNS ON-OFF / FUNCTIONS / USED WHEN:

works with photo cell and relay module amplifier controller

The dial on dash adjusts the sensitivity (turn on point).
[most users turn it all the way down]

– turns the system on/off
– also controls how long the headlights stay on after turning off the vehicle.

LOCATION IN VEHICLE:

interior, lower dash, left side of steering column, next to instrument cluster dimmer switch and headlight switch.

ORIGINAL GM PART NUMBER:

Delay Control “Switch” (rotary dial / dimmer wheel) 1987384

SWITCH / BASE COLOR:

brown, black wheel

CONNECTOR PLUG COLOR (SWITCH SIDE):

brown

WIRES ATTACHED (SWITCH SIDE):

n/a

CONNECTOR PLUG COLOR (HARNESS SIDE):

white

NUMBER OF WIRES ATTACHED (HARNESS SIDE):

4

COLOR & PURPOSE OF (HARNESS SIDE) WIRES:

black-yellow “A” (min, 15 sec), goes to sentinel amplifier “A” (delay input)

black “B” (on/off), goes to (junction) to ground
(junction connects to other things)

purple “C” (on/off), goes to sentinel amplifier “L” (on/off)

light green “D”, goes to sentinel amplifier “E” (delay input)

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OTHER NOTES:

This is a rotary dial, called a “potentiometer” that controls the speed/length of the lights staying “on.”

Other Buick vehicles came with the “twilght sentinel” system:
(should you be scrounging the junk yards trying to find parts)

Amplifier Module-5976634: 1981-85 Riviera, 1984-89 RWD LeSabre-Park Ave.
Ambient Light Sensor-16502712: 1984-85 Riviera, 1984-89 RWD LeSabre-Park Ave
Sensor Grille-25521070: 1982-85 Riviera, 1982-89 RWD LeSabre-Park Ave.

T82 rpo option code on trunk sticker

[SEE the Twilight Sentinel sensor post]
[SEE the Twilight Sentinel relay post]

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PHOTOS OF SWITCH AND CONNECTED WIRES:
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twilight sentinel operating instructions tag

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Here’s all of the Switches in the Buick Turbo Regals:
(you can click these links to go direct to these posts)

* A/C High Pressure Cut-out Switch (Back of Compressor)
* A/C Pressure Cycling Switch (on Accumulator)
* A/C Pressure Line (Under Alternator)
* Blower and A/C Clutch Control Module Switch (HVAC Fan Speed Control)
* Brake Pressure Switch (in Prop Valve)
* Brake Switch (Above Brake Pedal)
* Coolant Fan Temperature Switch (Under Throttle Linkage)
* Cooling High Temperature Switch (Manifold Front Passenger Side; Idiot Light)
* Cornering Light Switch (Regal Limited Models)
* Cruise Control Switch (Lever)
* Cruise Control Brake Switch
* Defogger Control Switch (Rear Defogger Button)
* Dome Reading Lights Switch
* Door Jamb Switch (Both Sides)
* Electronic Air Conditioning Touch Climate Control (Electric Touch A/C)
* Gear Selector Switch
* Glove Box Switch (for Light)
* Hazard Switch (Emergency Flashers)
* Headlight Switch
* Headlight Dimmer Switch (High Beam)
* Hobbs Switch (Digital Dash Cars)
* Horn Button Switch
* HVAC Fan Speed Control Switch (Heater A/C Control Head Blower Switch)
* HVAC Mode Control (Heater A/C Control Head Mode Switch)
* Ignition Switch
* Ignition Key Warning Switch
* Instrument Cluster Dimmer Switch (Dash Lights Brightness)
* Neutral Safety and Backup Light Switch
* Oil Pressure Switch
* Overtemp Hot Switch
* Park Brake Switch (Emergency Brake)
* PowerMaster Brake Switch
* Power Door Lock Switch (Both Sides)
* Power Seat Switch
* Power Window Switch (Both Sides)
* Radio Button (on/off Switch)
* Rear View Mirror Map Light Switch
* Seat Belt Switch
* Sunroof Switch (Astroroof Moonroof)
* Theft Deterrent Warning System Tamper Switches
* Trunk Light Switch
* Trunk Release Button
* Turbo Power Light Switch (Digital Dash Cars)
* Turn Signal Switch (Lever)
* Twilight Sentinel Switch (Rotary Dial)
* Under Hood Light Switch (engine bay compartment)
* Vanity Mirror Light Switch (Passenger Side Visor)
* Wiper and Washer Switch

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