Ac Fan Relay Wiring
Purchase a 4 post relay with a 30 amp rating.
Ac fan relay wiring. This relay will have 2 wires going to ground our grey wire and an additional wire going from the relay to the green wire by the ac compressor. Using the multimeter to perform an amp draw as well as replacing the blower motor relay. They can also be used when dual electric fans are installed using one switching device. It reveals the parts of the circuit as streamlined shapes and the power as well as signal connections between the devices.
The other two wires on the relay are the meat and potatoes of the system with the yellow wire connecting to the battery along with the supplied fuse mounted within 12 inches of the battery. If you have a c and would like to have the option of turning on the electric fan when the a c is turned on you can use an additional 500479 relay kit wired as shown. Find a spot to secure the relay with a screw or a bolt. Air conditioner doesnt blow any air.
Or in an 84 to 89 240 you may use the a c power on wire. 30 amp fuse 86 30 87 85 optional 2nd relay overrides temp sensor and turns on fan when a c is turned on. 1st relay turns on fan when temp sensor is activated battery 86 30 87 85 12v switched wire to green wire at a c clutch. Variety of hvac fan relay wiring diagram.
A wiring diagram is a simplified standard photographic depiction of an electrical circuit. This setup turns the fan on as soon as the a c switch is turned on. Hvacr fan switching relay how it works. Red white wire at ac switch microswitch in dash.
Blower motor relay not working sam. Compressor via a 3rd store bought relay. Spal electric fan relay wiring kits are designed to automatically turn on your spal electric fan when the air conditioning is turned on. Locate the relay in immediate proximity to the fan being used.
Hvac electrical troubleshooting fan relay. Ac service tech llc. Understanding basic electrical wiring and components of air conditioning systems.