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Neutral Safety and Backup Light 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:

Neutral Safety and Backup Light Switch
park/neutral switch
Gear Selector Switch

PURPOSE OF SWITCH:

sets different functions depending on what gear is selected.
tells the ECM if you’re in gear or not.
turns on backup lights.

TURNS ON-OFF / FUNCTIONS / USED WHEN:

multiple, see wire description below

LOCATION IN VEHICLE:

interior, behind dash, attached to the top/bottom of the steering column

ORIGINAL GM PART NUMBER:

?
NS41

SWITCH / BASE COLOR:

white with brass tabs

CONNECTOR PLUG COLOR (SWITCH SIDE):

n/a

WIRES ATTACHED (SWITCH SIDE):

n/a

CONNECTOR PLUG COLOR (HARNESS SIDE):

black

NUMBER OF WIRES ATTACHED (HARNESS SIDE):

multiple

COLOR & PURPOSE OF (HARNESS SIDE) WIRES:

THIS IS THE NEUTRAL SAFETY SWITCH PORTION:

p/n switch

“A” orange-black, goes to ecm “B10” (12v, park/neutral switch input)

“B” black-white (ground wire to transmission): goes to (junction) to backup lights “B”
(junction connects with other things)

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THIS IS THE BACKUP LIGHT PORTION:
[switch is closed with gear in reverse]

[2 wires on 1 terminal; incoming power]
dark blue “A” (1 of 2 wires), goes to turn b/u fuse
(connects with turn flasher)

dark blue “A” (1 of 2 wires), goes to turn lights

light green “B” to (junction) to backup lights

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black-white “A”, goes to (junction) to ECM “D1” (power ground)
(junction connects with other things)

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PHOTOS OF SWITCH AND CONNECTED WIRES:
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84-85 ecm vss gear o2 tps coolant temp

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OTHER NOTES:

This is part of the the “gear selector switch” as identified on diagrams.

Even though this is termed a “neutral safety switch,” it does NOT perform in the conventional manner. This switch has nothing to do with actually starting the car in PARK or NEUTRAL or not, all this switch does is let the ECM know if you are NOT in gear.

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

[SEE reverse light bulbs]

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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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