4 Wire Cooling Fan Wiring Diagram Start with taking both of the positive wires from the fans and connect them to the yellow wires on each relay. you will then need to run switched power (usually from your ignition switch, but modern replacement wiring harnesses usually have a fused fan relay trigger wire) to the blue wires on the relays. next, both of the black wires from the. Step 4: strip the wires. using wire strippers, carefully strip the insulation off the ends of the wires. be sure to expose enough wire to make a proper connection, but not too much that it poses a safety risk. trim any excess wire if necessary.
4 Wire 2 Speed Cooling Fan Wiring Diagram 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). then connect switched power (usually from your ignition switch), to the blue wires on both relays (tab 86). next, splice together both black wires from the relays (tab 85) and connect them to the thermostat. Step 4: install the switch. mount the two speed switch in a convenient location. connect the live wire from the power supply to the input side of the switch. connect the output side of the switch to the live wires that are connected to the fan motor. this will allow you to control the speed of the fan using the switch. The wiring diagram for a two speed electric fan typically includes a power source, a relay, a temperature switch, and the fan motor. the power source can be connected directly to the battery or through a fuse box, depending on the setup. the relay acts as a switch, controlling the power flow to the fan motor. 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.
4 Wire Cooling Fan Wiring Diagram The wiring diagram for a two speed electric fan typically includes a power source, a relay, a temperature switch, and the fan motor. the power source can be connected directly to the battery or through a fuse box, depending on the setup. the relay acts as a switch, controlling the power flow to the fan motor. 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. 2 speed engine cooling fan wiring. i'm looking for some advice on hooking up a 2 speed cooling fan in my hotrod. the fan i have has 3 wires, a ground and 2 positives. low speed is activated by one positive wire and high speed is activated when both positive wires are connected. i will be controlling them with an on off on toggle switch and 2. Diagram #2 important wiring important: reference diagrams #7&8onpage 2 the electric fan assembly is built using a high output two speed motor. if you choose to operate the fan using both speeds, two switching devices or a derale dual fan controller part # 16788 or 16789 is recommended. black wire grey wire brown wire ground ( ) low speed.
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