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A/C Air Conditioning Pressure Cycling Switch (R-12 R-134A on accumulator)

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:

A/C Pressure Cycling Switch

PURPOSE OF SWITCH:

makes sure that the pressure stays at a consistent level so the A/C can function properly

TURNS ON-OFF / FUNCTIONS / USED WHEN:

in use while the air conditioning system is on

LOCATION IN VEHICLE:

engine compartment, passenger side, on accumulator (receiver/dryer) facing towards the RH fender

ORIGINAL GM PART NUMBER:

?

SWITCH / BASE COLOR:

metal, brass tabs

CONNECTOR PLUG COLOR (SWITCH SIDE):

oem black
purple
could be other colors

WIRES ATTACHED (SWITCH SIDE):

n/a

CONNECTOR PLUG COLOR (HARNESS SIDE):

black

NUMBER OF WIRES ATTACHED (HARNESS SIDE):

2

COLOR & PURPOSE OF (HARNESS SIDE) WIRES:

light green “A”, goes to blower and a/c clutch control module (HVAC fan speed) “B”

light blue “B”, goes to (junction) to a/c cutout relay “D”

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OTHER NOTES:

This is 1 of 3 switches the air conditioning system uses.
See also:
* AC High Pressure Cut-out Switch (back of compressor)
* AC Pressure Line (under alternator)

[side note: the accumulator (evaporator) receiver / drier was originally black in color from the factory]

OEM:
AC Pressure Cycling Switch for R-12 refrigerant:
for use in systems with R-12 refrigerant ONLY.
(opens above 25 psi)

UPGRADED:
AC Pressure Cycling Switch for R-134a
for use in systems with R-134a refrigerant ONLY
on at 42 PSI, off at 21 PSI.
[open below 25 psi refrigerant pressure]

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PHOTOS OF SWITCH AND CONNECTED WIRES:
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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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