Wiring Diagram For Cooling Fan Relay 87 (red wire) connects to the positive wire on the electric fan. 30 (other red wire) needs constant 12 volt power from the battery. 86 (gray white wire) goes to the ignition switch. With dual cooling fans, there are two methods for wiring up the relay kit. this is based on the draw from the fans, if the fans are larger and draw more than 15 amps each, it's recommended to install a second relay kit as shown below. for smaller fans, both fans can be connected to a single relay as shown above, and the proper fuse should be.
How To Wire Auto Electric Cooling Fan This video shows how to easily wire an electric radiator fan circuit into any car. this fan wiring diagram includes a fan relay, a temperature switch, and a. Optionally, a single high current relay could be used to control both fans. the supplied diagram below using dual relays with a single temp sensor is both the most reliable and easiest method we've found for wiring dual fans. it uses our 40 amp electric relay kit and electric fan sensor. the relay isolates the high amp load of the fan circuit. Or a single relay could be used to control both fans. the cooling fan wiring diagram below is what we’ve found to be the simplest and most reliable method. it uses a 40 amp electric relay and electric fan sensor. start your wiring project by taking both of the positive wires from the fans and run them to the yellow wires on each relay (tab 87). 30: constant 12v, unswitched 85: signal (switched 12v) 86: ground (completes circuit) 87: consumer (fan) 12v 87b: extra consumer (same as 87) 12v switched wire. may be green wire at a c clutch. note: or in an ’84 to ‘89 240 you may use the a c power ‘on’ wire: red white wire at ac switch microswitch in dash.
Automotive Electric Fan Relay Wiring Diagram Or a single relay could be used to control both fans. the cooling fan wiring diagram below is what we’ve found to be the simplest and most reliable method. it uses a 40 amp electric relay and electric fan sensor. start your wiring project by taking both of the positive wires from the fans and run them to the yellow wires on each relay (tab 87). 30: constant 12v, unswitched 85: signal (switched 12v) 86: ground (completes circuit) 87: consumer (fan) 12v 87b: extra consumer (same as 87) 12v switched wire. may be green wire at a c clutch. note: or in an ’84 to ‘89 240 you may use the a c power ‘on’ wire: red white wire at ac switch microswitch in dash. First, remove your car’s stock mechanical fan and mount your electric fan onto your radiator. then, install the single relay where it is safe from excessive heat and water. exposure to these elements can compromise the functionality of your new cooling system. next, connect each of the wires as per the wiring diagram. Step 1: find the underhood fuse or relay box. step 2: remove the fuse or relay box cover. step 3: identify the cooling fan relay. step 4: ensure the power is off. step 5: replace the cooling fan relay. step 6: match your replacement relay to the original relay. step 7:install a new automotive cooling fan relay.
12v Cooling Fan Relay Wiring Diagram First, remove your car’s stock mechanical fan and mount your electric fan onto your radiator. then, install the single relay where it is safe from excessive heat and water. exposure to these elements can compromise the functionality of your new cooling system. next, connect each of the wires as per the wiring diagram. Step 1: find the underhood fuse or relay box. step 2: remove the fuse or relay box cover. step 3: identify the cooling fan relay. step 4: ensure the power is off. step 5: replace the cooling fan relay. step 6: match your replacement relay to the original relay. step 7:install a new automotive cooling fan relay.
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