Automotive Fan Relay Wiring Diagram. The fan will turn on when the ac compressor activates. Pin 87 yellow wire pin 85 orange wire pin 86 grey wire pin 30 red wire.
It can be used for various switching. Either way check the terminal numbers on the relay itself the coil is. The gray wire from the ac relay goes to the 12 volt of the ac compressor clutch wire.
Wiring diagram for car relay.
If the coil is not activated 30 will always be connected to 87a. To grey wiretemperature sender. Each should have the capacity of a single fan. Wiring a single cooling fan.