banner ads for header
banner ads for header
banner ads for header
banner ads for header
banner ads for header
banner ads for header
banner ads for header
banner ads for header
banner ads for header
banner ads for header
banner ads for header
banner ads for header
banner ads for header
banner ads for header
banner ads for header
banner ads for header
banner ads for header

A/C Air Conditioning Compressor High Pressure Cut-Off Switch (on Compressor)

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.

.

VEHICLE APPLICATION:

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

SWITCH NAME:

A/C Air Conditioning Compressor Cut-Off Switch
A/C Compressor Switch
a/c high-pressure cut-out switch

PURPOSE OF SWITCH:

allows clutch control ONLY when there is adequate pressure in the system
protects the system from over pressure

TURNS ON-OFF / FUNCTIONS / USED WHEN:

in use when Air Conditioning is on

LOCATION IN VEHICLE:

mounted on the AC compressor, back/bottom side

ORIGINAL GM PART NUMBER:

?
2780448 (replacement, blue)

SWITCH / BASE COLOR:

red
blue with chrome outer housing (replacement)

CONNECTOR PLUG COLOR (SWITCH SIDE):

n/a

WIRES ATTACHED (SWITCH SIDE):

n/a

CONNECTOR PLUG COLOR (HARNESS SIDE):

black, small round connector

NUMBER OF WIRES ATTACHED (HARNESS SIDE):

2

COLOR & PURPOSE OF (HARNESS SIDE) WIRES:

black “A”, goes to a/c compressor clutch “B”
(“B” also has a wire that goes to cap/diode lead which is inside connector)

black “B”, goes to (junction) to ground
(junction connects with coolant fan)
(junction connects with other things)

.

OTHER NOTES:

This is 1 of 3 switches the air conditioning system uses.
See also:
* AC Pressure Cycling Switch (on accumlator)
* AC Pressure Line (under alternator)

called “a/c high-pressure cut-out switch” on diagrams.

[switch opens above 430 psi, closes below 200 psi]

[the diode mentioned above is contained within the connector plug]

switch base color can be a variety of different colors (replacements are blue, green, etc.).
[if you need to replace this part, take it with you to the store, or try to get the same color version if ordering online!]

.

PHOTOS OF SWITCH AND CONNECTED WIRES:
.

.

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

.

Related posts


Hey, Turbo Buick Fan!

Was this post beneficial?
More Cool Info is Added Daily!
DON'T Miss Out!
Sign up to our FREE subscription service
and receive an email whenever we post new articles.

Just enter your email address below and click the Subscribe button.
(NO spam sent - only new post alerts)

Join 1,012 other subscribers