Which is the no wire on an electric fan relay?
# 86 is frame ground off the relay. # 30 is common on the relay. 12VDC hot that will run the fans, make sure the wire size is big enough for the amps. # 87 is your NO ( normally open ) Once the #85 is energized from the thermal switch, the coil changes state and passes #30 to # 87 internal of the relay and send 12V to the fan motor.
What happens to the NC when a relay is off?
When a relay is off, the COMMON is connected to the NC (Normally Closed). The NO (Normally Open) connection of the relay is not connected until the relay turns on. When the relay turns on, the COMMON move from NC to NO. Mechanical relays create a Clicking sound that indicates movement o the COMMON terminal.
Can a reverse relay connect to a positive relay?
Reverse will connect the Motor Positive to Ground and the Motor Negative to V+. Not all relay combinations are safe. Because this is a H-Bridge configuration, certain relay combinations will short out both relays, causing permanent damage. For this reason, we strongly suggest using a Fuse with a rating appropriate for the Motor and the Relays.
Where does the yellow wire go on an 86 fan?
From looking at the directions it looks like the yellow wire goes to the thermal switch therfore your 86 would go to thermal switch. (1 wire thermal) or use a 2 wire thermal and send it 12v+ then from thermal to YELLOW.
# 86 is frame ground off the relay. # 30 is common on the relay. 12VDC hot that will run the fans, make sure the wire size is big enough for the amps. # 87 is your NO ( normally open ) Once the #85 is energized from the thermal switch, the coil changes state and passes #30 to # 87 internal of the relay and send 12V to the fan motor.
Do you need a relay kit for a cooling fan?
A relay kit, our part number CCFKRL, will include everything you need to properly wire up your electric cooling fans, with the exception of additional wiring needed to complete all of the circuits. The first part of the installation is to install the electric fan to your radiator, and remove the mechanical fan.
What should I do if my relay has failed?
Turn the ignition to the “ON” position and jump terminals 87 and 30 the relay is now jumped and the accessory should activate, if so the relay has failed. If no power is observed at either 87 or 30, the fusible link or maxi fuse has shorted.
What kind of Fuse do you need for a fan relay?
For a second relay, both gray wires can be connected to the temperature sender, and both orange wires can be connected to your 12 volt ignition source. Each relay will control a single fan, and a 30 amp fuse is recommended for each relay connection to the battery.