Creative Compressor Relay Wiring Diagram Domestic Refrigerator Starting Relays | Hermawan'S Blog - If you see battery voltage on one terminal, leave the lead in that terminal and flow the bad lead to the opposite terminal. In case you see battery voltage with each leads related to the electric connector, that confirms the compressor take hold of is getting power and ground. Meaning the clutch coil is horrific. Some clutches are replaceable, others aren’t and you have to update the whole compressor. The pcm will not provide floor to the compressor relay if the system is low on refrigerant or the stress within the machine is too excessive because of a blocked condenser, horrific orifice tube or tmx valve. Locate the low stress and high stress switches. With meter nevertheless set on dc volts, disconnect the electric connector on the low pressure switch. Join the advantageous result in one terminal and the poor cause the alternative terminal. Start the engine and flip the a/c to max. Search for voltage on one of the two terminals (five). If you see volts, that means the pcm is providing electricity. Do the same test at the high pressure transfer 5). Of energy is present at both switches, behavior a continuity check throughout the transfer contacts step 4.
Engine off. Disconnect the electrical connector at compressor seize. Set meter at dc volts. Connect fine cause one terminal in take hold of electrical connector (1) , negative lead to battery floor. Begin engine with a/c became to max. Search for battery voltage on meter. If voltage is 0, circulate advantageous lead to the opposite terminal in electric connector. If still 0, continue to step 2. Discover the compressor grasp relay and take away it from its socket. Connect the terrible meter cause battery terrible terminal. Probe the relay socket terminals to detect battery electricity at terminals 2 & 3. In case you don’t see battery voltage on both terminals, check the fuses and wiring to the relay. If you have battery energy on both terminals, join the high-quality cause terminal 3 and the poor lead to terminal four. You should see battery voltage. If you don’t, the pcm isn’t presenting ground to the relay control coil, move to step three.
If the a/c in your car isn’t working, the first step is to look if the compressor runs while the activate the a/c and the engine. If you find out an ac compressor won’t run state of affairs, observe these diagnostic steps to find out what’s incorrect. You’ll need a virtual multimeter and a wiring diagram or components locator to find the excessive and occasional stress switches.