10 New Automotive, Wiring Diagram Solutions
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Automotive, Wiring Diagram - The pcm will not offer ground to the compressor relay if the machine is low on refrigerant or the stress in the system is just too excessive because of a blocked condenser, bad orifice tube or tmx valve. Find the low stress and excessive strain switches. With meter still set on dc volts, disconnect the electrical connector at the low stress transfer. Connect the advantageous result in one terminal and the negative result in the opposite terminal. Start the engine and flip the a/c to max. Search for voltage on one of the terminals (five). In case you see volts, which means the pcm is imparting energy. Do the same check at the excessive strain transfer 5). Of energy is gift at both switches, behavior a continuity check throughout the switch contacts step 4.
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Find the compressor grasp relay and do away with it from its socket. Join the bad meter lead to battery terrible terminal. Probe the relay socket terminals to detect battery power at terminals 2 & 3. If you don’t see battery voltage on each terminals, test the fuses and wiring to the relay. If you have battery electricity on each terminals, connect the fine lead to terminal 3 and the negative result in terminal 4. You need to see battery voltage. In case you don’t, the pcm isn’t supplying floor to the relay control coil, pass to step three.
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