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Ignition Switch

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:

Ignition Switch

PURPOSE OF SWITCH:

When the key is turned, a rod in the steering column is pushed downward (towards the firewall) which makes the connection on the ignition switch to activate the starter (etc).

TURNS ON-OFF / FUNCTIONS / USED WHEN:

when you turn the car key forward (“on”) the ignition switch is engaged

LOCATION IN VEHICLE:

located on top of the steering column (behind dash).

ORIGINAL GM PART NUMBER:

?

SWITCH / BASE COLOR:

metal base with white or blue body

CONNECTOR PLUG COLOR (SWITCH SIDE):

white or blue

WIRES ATTACHED (SWITCH SIDE):

n/a

CONNECTOR PLUG COLOR (HARNESS SIDE):

There’s 2 wiring plugs that attach, 1 is light blue (front), 1 is black (rear, nearest the firewall).

NUMBER OF WIRES ATTACHED (HARNESS SIDE):

8

COLOR & PURPOSE OF (HARNESS SIDE) WIRES:

purple-white (“start” “S”), goes to starter interrupt relay (“D”) (for theft deterrent system)
or to purple wire to starter without theft deterrent system

pink (“run” “T1”), goes to (junction) starter interrupt relay (“B”) (for theft deterrent system)
[the below connections are all on separate wires coming from the junction]
(junction connects with ecm sol fuse)
(junction connects with ccci fuse)
(junction connects with gages fuse)
(junction connects with cruise fuse)
(junction connects with turn b/u fuse, ecm ign fuse, fp/inj fuse, st blt/acc fuse)
(junction connects with twilight sentinel)
(junction connects with other things)

red (start), goes to (junction) fusible link “A”
(connects with fusible link “B”)
(connects with stop haz fuse)
(junction connects with other things)

another red (accy), goes to (junction) & connects with above red wire items

brown (run “A”), goes to wiper fuse, radio fuse

orange (run “T3”), goes to c/h fuse – a/c fuse – wdo circuit breaker

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dark green “G1”, goes to (junction) to water temp indicator bulb (on dash) “4”
(connects with coolant temp switch “B”)
[coolant temp switch closed above 250 degrees]

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tan-white “G2” (bulb test, start), goes to (junction) to instrument cluster brake indicator light
(connects with brake pressure switch, park brake switch, ignition switch, PM brake accumulator pressure switch “”B)

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PHOTOS OF SWITCH AND CONNECTED WIRES:
.

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OTHER NOTES:

[mechanical block in steering column allows starting in “N” or “P” only]

To remove plugs: the rear connector (black) must come out first.
There is a latch lever on both plugs that need to be lifted up to remove.
The blue plug lever is on the front. The black plug lever is on the rear (nearest the firewall).
Reinstall them in the opposite order.

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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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