Saturday, August 6, 2022

How To Wire A Relay For Electric Fan

Just an idea on how to wire up electric cooling fans for your vehiclecooling fans: An electric fan is a great upgrade ove.


Wiring Safely Fan Relay Wiring With C&R Racing

Connect the temp switch to 86 on one radiator fan relay, use a diode to connect 86 on the first radiator fan relay to 86 on the second radiator fan relay.

How to wire a relay for electric fan. Connect from the pressure switch or compressor clutch to 86. How to wire electric fan with relay and switch how to wire electric fan with relay and switch. Connect one, 85?, to ground on each relay.

Discussion starter · #1 · oct 6, 2020. Don't forget to fuse the supply wire!! Manual fan on override switch pink orange red black

First,wire 85 connects the relay to the thermostatic switch, which determines when the fan is operational. 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. If you are unsure which wire is which coming out of the electric fan, find the fan manufacturer's supplied wiring diagram.

How to wire the electric fan. Wire your relay(s) coil to a properly fused 12 volt switched source. Use a female terminal on the other end and attach it to the switch terminal of the relay.

Start with taking both of the positive wires from the fans and connect them to the yellow wires on each relay. Or in an '84 to '89 240 you Preset pressure for fan relay ground page 2 electric fan relay wiring optional fan temp switch sending unit (self grounding or separate ground terminal type) pink red black orange relay trigger to a fused 12 v ignition source 12 volt battery source.

For the condenser fan relay you can connect to the clutch power, whenever the clutch is on the fans will turn on. Simple easy way to wire a automotive relay for fuel pumps, electric fans, electric water pumps, headlights, any automotive wiring. Signal circuit 12v switched (ignition or fuse panel) power "on" when key is in the "run" position.

Joined oct 10, 2002 · 2,077 posts. 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. Electric fan relay wiring for microsquirt.

The ground side of your coil will go to the switch in your dash, through the switch contact to ground. Third,wire 87 connects to the electric fan's positive wire. How to wire electric fan with relay and switch.

The main wire from the battery is what supply's the power for the fan, the little wire coming from terminal 86 work with the the wire to the thermostatic switch terminal 85. When the engine get up to temp that switch grounds out and the contacts inside the relay complete the circuit to send power to the fans. Your contacts will be as follows, the normally open contact (no) will go via a properly sized wire to a fuse link at the battery or at the main cable terminal on the starter.

Secondly,wire 86 is the connection to your car's ignition switch. Does anyone have a diagram of how the relay for the electric fan should be wired so that it can be controlled by the microsquirt? The positive wire coming from the electric fan will connect to one of two red wires on your relay while the negative wire needs to go to ground.


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