Hvac Relay Wiring Diagram

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Contactor 240v chanish 120v 220v. Terminal 85 is ground for the coil side of relay, controlled by the pcm. When the relay is energized, that line with the arrowhead, moves to terminal 87, that circuit carries voltage to ac compressor. At the ac compressor, dark green wire is voltage, black is ground. You have to have both. You might be ahead to check for hvac trouble codes. Hvac relay wiring diagram from i1. wp. com print the wiring diagram off in addition to use highlighters to trace the circuit. When you employ your finger or the actual circuit with your eyes, it may be easy to mistrace the circuit. Electrica l circui t diagra m manual 0000017581 electrica l circui t diagrams revisio n 1 jul y 2015 electrical circuit diagrams 3200 4100 4200 4300 4400 7300 navistar, inc.