7 Nice Car Aircon Electrical Wiring Diagram Photos
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Car Aircon Electrical Wiring Diagram - Discover the compressor grasp relay and dispose of it from its socket. Join the terrible meter cause battery terrible terminal. Probe the relay socket terminals to discover battery power at terminals 2 & 3. If you don’t see battery voltage on both terminals, test the fuses and wiring to the relay. When you have battery energy on both terminals, connect the superb result in terminal three and the negative lead to terminal four. You must see battery voltage. In case you don’t, the pcm isn’t offering floor to the relay manipulate coil, flow to step 3.
If you see battery voltage on one terminal, leave the lead in that terminal and flow the bad result in the opposite terminal. In case you see battery voltage with each leads connected to the electrical connector, that confirms the compressor grasp is getting power and floor. That means the clutch coil is terrible. Some clutches are replaceable, others aren’t and also you ought to update the whole compressor.
The pcm will now not offer ground to the compressor relay if the device is low on refrigerant or the stress within the system is simply too high due to a blocked condenser, horrific orifice tube or tmx valve. Find the low strain and high pressure switches. With meter still set on dc volts, disconnect the electric connector at the low strain switch. Connect the effective cause one terminal and the poor cause the opposite terminal. Begin the engine and flip the a/c to max. Look for voltage on one of the terminals (five). In case you see volts, which means the pcm is offering energy. Do the same check at the excessive stress switch 5). Of energy is present at both switches, conduct a continuity take a look at throughout the transfer contacts step 4.
If the a/c to your vehicle isn’t running, the first step is to peer if the compressor runs while the turn on the a/c and the engine. In case you discover an ac compressor won’t run scenario, comply with these diagnostic steps to find out what’s incorrect. You’ll need a virtual multimeter and a wiring diagram or parts locator to find the high and coffee pressure switches.