Car Ac Pressure Switch Wiring Diagram

The connection sends 0 5 volts of pressure to the pcm fuse.

Car ac pressure switch wiring diagram. You can next try jumping the pressure switch es to see if you can get the compressor to operate. Connect the wires according to the numbers printed on it. San antonio tx 78266 p. You have to make sure that the compressor has enough oil to function properly.

Dual function high pressure switch. Find the signal on the wiring diagram that you are missing at the relay and continue to follow it back. Hvac controller sends an ac request signal to pcm 4. 1 driver selects ac 2.

Ac system not working properly. In a few car models the power of the air conditioning system flows from the ac switch to the fuse before being transmitted to the clutch oil through the low pressure evaporator temperature. Low pressure ac cycling switch. Pcm checks cylinder head temp sensor.

Take caution when doing this as you can cause damage if you are not familiar with how your ac electrical system works. It so happens that on some vehicles cadillacs the high pressure sensor is connected to the other sensor voltage reference line. So a shorted sensor will render the crank sensor inoperable. Pcm checks ambient temp sensor must be above 35 f 5.

Must be below set. Vintage air 18865 goll st. You have to bypass 3 wire ac pressure switch from b1 to b4 to power up the compressor clutch. How to vacuum ac system in your car.