Air Conditioning Compressor Cycling Switch Location?

[Thunderwing]

Hi,

Does anyone know where the Air Conditioning Compressor Cycling Switch is located on a 1999 Ford Contour SE 2.5L?

I found these troubleshooting steps (my compressor is not engaging).. but I don't know where the A/C Cycling switch is? Please help! Thanks.

A3 CHECK THE A/C CYCLING SWITCH​

Disconnect A/C Cycling Switch C692​

Connect a fused jumper wire between A/C cycling switch C692, pin 4, circuit 14S-CA17 (VT/OG) and pin 1, circuit 14S-CA38 (VT).​

• Does the A/C clutch engage?

Yes GO to A4.
No GO to A5.

A4 CHECK THE REFRIGERANT SYSTEM PRESSURE​

Connect gauge set to port. High side reading must be above 169 kPa (50 psi).​

• Is the high side pressure above 169 kPa (50 psi)?

Yes INSTALL a new A/C cycling switch. TEST the system for normal operation.
No CHECK and REPAIR the refrigerant system for leaks or low charge or incorrect A/C compressor clutch air gap. TEST the system for normal operation.

A5 CHECK FOR VOLTAGE AT THE A/C CYCLING SWITCH - CIRCUIT 14S-CA17 (VT/OG)NOTE: Verify the switch is in the MAX A/C position.

Measure the voltage between A/C cycling switch C692, pin 4, circuit 14S-CA17 (VT/OG) and ground.​

• Is the voltage greater than 10 volts?

Yes GO to A6.
No GO to A20.

A6 CHECK FOR VOLTAGE TO THE DUAL PRESSURE SWITCH - CIRCUIT 15S-FA38 (GN/RD)NOTE: If the pressure is decreasing the A/C compressor cycling switch will be opened and no voltage will be seen at the pressure switch. The pressure must be increasing to see any voltage at the pressure switch.NOTE: Verify the switch is in the MAX A/C position and don't disconnect the jumper wire of C692.
Disconnect Dual Pressure Switch C882​

Measure the voltage between dual pressure switch C882, pin 2, circuit 15S-FA38 (GN/RD) and ground.​

• Is the voltage greater than 10 volts?

Yes GO to A7.
No REPAIR circuit 15S-FA38 (GN/RD). TEST the system for normal operation.

A7 CHECK THE DUAL PRESSURE SWITCH

Measure the resistance, component side between the dual pressure switch terminals.​

• Is the resistance less than 5 ohms?

Yes GO to A8.
No INSTALL a new dual pressure switch. TEST the system for normal operation.

A8 CHECK CIRCUIT 15S-RE9 OR 15S-RE9A (GN/BU)​

Connect Dual Pressure Switch C882

Measure the voltage between the PCM, C421, pin 41, circuit 15S-RE9A (GN/BU) and ground.

• Is the voltage greater than 10 volts?

Yes GO to A9.
No REPAIR circuit 15S-RE9 or 15S-RE9A (GN/BU). TEST the system for normal operation.

A9 CHECK THE A/C CYCLING SWITCH C692 FOR OPENDisconnect the jumper wiring of C692.​

Connect A/C cycling switch C692

Measure the voltage between the PCM, C421, pin 41, circuit 15S-RE9A (GN/BU) and ground.​

• Is the voltage greater than 10 volts?

Yes GO to A10.
No INSTALL a new A/C cycling switch. TEST the system for normal operation.

A10 CHECK CIRCUIT 15-FA12 (GN/BU) FOR VOLTAGENOTE: If the pressure is decreasing the A/C compressor cycling switch will be opened and no voltage will be seen at the A/C WOT relay. The pressure must be increasing to see any voltage at the WOT relay.
Disconnect A/C WOT Relay C465​

Measure the voltage between A/C WOT relay C465 pin 3, circuit 15-FA12 (GN/BU) and ground.

• Is the voltage greater than 10 volts?

Yes GO to A11.
No REPAIR circuit 15-FA12. TEST the system for normal operation.

 

[turboman57]

The A/C cycling switch is mounted on top of the suction accumulator (dryer) located on the left side of the radiator ( drivers side). Hope that helps.