Where is the low pressure switch on a GMC Truck?
Check the charge first before you insert the dye. The low pressure switch is at the Drier – You can see the connector on the right side. Disconnect it and place a paperclip or wire between the two terminals on the harness. This will turn on your compressor.
What happens when you jump the low pressure switch?
Jump the low pressure switch only to test the circuit. Low AC pressure will prevent the relay from sending power to the AC compressor clutch. If you jump the low pressure switch with the engine running, do it only for a few seconds. Do NOT jump the low pressure switch to operate the compressor non-stop so you can add refrigerant.
How to jump 3 wire AC pressure switch easily?
Check the numbers printed on your AC and connect wires according to it. You need to bypass 3 wire AC pressure switch through the B1 to B4. This is done to power the compressor clutch. When you do this, the connection will send 0-5 volts of pressure through the PCM fuse.
Why does my GMC clutch not come on?
Now, the low pressure switch could be bad and not letting the AC comp. come on. Check the charge first before you insert the dye. The low pressure switch is at the Drier – You can see the connector on the right side. Disconnect it and place a paperclip or wire between the two terminals on the harness. This will turn on your compressor.
Jump the low pressure switch only to test the circuit. Low AC pressure will prevent the relay from sending power to the AC compressor clutch. If you jump the low pressure switch with the engine running, do it only for a few seconds. Do NOT jump the low pressure switch to operate the compressor non-stop so you can add refrigerant.
Check the numbers printed on your AC and connect wires according to it. You need to bypass 3 wire AC pressure switch through the B1 to B4. This is done to power the compressor clutch. When you do this, the connection will send 0-5 volts of pressure through the PCM fuse.
Where are the low and high pressure switches on a car?
The low-pressure side switch is found before the AC compressor, while the high-pressure switch comes after the compressor. Most AC pressure switches are found within the engine compartment, but some manufacturers put them elsewhere.
What happens if the AC pressure switch fails?
The AC pressure switch is responsible for turning on and off the compressor. And if the compressor fails to turn on, then the switch is the problem. If the AC switch fails, the compressor also fails. The main role of the compressor is to supply refrigerant to the AC system. It’s responsible for delivering cool air in your car cabin.