Do not jump the low pressure switch to operate the compressor non stop so you can add refrigerant. It does the process by monitoring fan operation high pressure and low pressure then sending the information back to the computer for it to analyze.
Pressure Sensor Wikipedia
Diagram how to jump 3 wire ac pressure switch. These are used with gm variable control compressors and displacement compressors. The three wire switches is also called as pressure transducers. Disconnect the negative battery cable. So a shorted sensor will render the crank sensor inoperable. Then set it aside. Remove the switch electrical connector.
The pressure switch can be mounted to ac pressure line compressor or accumulatordrier. Maybe they filled it and didnt check for leaks. I think the problem lies in the low voltage coming out the sensor. Part 2 of 3. So ive sent him back to the place that regassed the ac to have it pressure checked. How to jump 3 wire ac pressure switch.
If you jump the low pressure switch with the engine running do it only for a few seconds. Disconnect the negative battery cable with a wrench of ratchet. One might wonder how to jump 3 wire ac pressure switch by own. Ive tested the voltage on the signal wire at the ecu and got 02v with engine running and ac on. It so happens that on some vehicles cadillacs the high pressure sensor is connected to the other sensor voltage reference line. Ac systems in vehicles run with a pressure switch.
You can jump three wire ac pressure switch to control the ac system as well. You might have to do some repairs by yourself to make it run correctly again. Maybe they just told him. 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. The ac runs perfectly but you cannot control it with the button.
Remove the ac pressure switch.
Gallery of Diagram How To Jump 3 Wire Ac Pressure Switch
