I'm going to get my finger out and wire up my thermo fans with an auto switch in the top tank. arrow on the fan blade and when wiring, ensure the fan rotates in the direction of the arrow in all cases. 16-18 ga: all others. Yellow – The yellow wire connects to your compressor. 1. What gauge wire are you using for wiring up the fans? The issue I've got (comes up at the drags alot) is shut the car off when still hot. The left-illustration shows normal wiring for this set-up. Get the 10 gauge wire and place it through the hole in your fire wall. I have found a few ideas and some must … Step 2. sim_rx3 wrote:ok first of all banging a thermo fan up to a radiator isnt the right thing to do. Cut both wires and strip 1/2 an inch of insulation off of the ends of the two fan wires. 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. Page 1 of 4 - Thermo Fan Wiring - posted in Electrical: Hey Guys. Optimum Thermatic Fan p (forced air erformance flow) will be achieved by mounting the fan directly to the surface of the respective condenser and radiator core. Any ways looking for ideas on how to wire it into the car. as the amount of radiator the electric thermo fan draws air through will be less than what the mechanical fan with a shroud would have done. Red – Now, there can be two separate wires for this. Orange – This wire connects to your heat pump (if you have one). Direct power from the back of the altenator to the fans. optional 2nd relay overrides temp switch and turns on fan when a/c is turned on fan adjustable fan wiring up thermo fan spdt relay - Hey Guys,I have been having issues wiring this thermo fan up.The LED light on the Fuse is always on when the ignition is off.The LED light goes off when the car is turned on.The LED comes on when the thermo switch hits its open ground (90degrees)The fan does not run The blue wire on the thermostat is the Common or “C” wire. If you are having your fan … -ve wire to a relay. Hey guys i have a thermo fan to setup on my corolla and have a thermatic switch i grabbed from an ae82 i think its on at 90 off 85, cant remember. This will be the wire that connects your switch to your fan power wire. Blue. Pics of : How To Wire Up Thermo Fan Relay. 2. The green wire connects to the fan. 12v switched wire to green wire at a/c clutch. I'm not going ot use the davies craig ones in the hose, ive got one welded into the top tank already. This wire connects to your heat pump (if applicable). What can be done to delay the fans coming on when first starting the car? Red (H). White – The white wire is what connects to the (auxiliary) heat on your system. recommended wire sizes: 8-10 ga: fan power and ground. u can just wire it up straight to the batt if u dont know how to wire into the ignition. Go to refire car when it's still got and fans kick in straight away before car has a … The Rh wire connects to the heating system. Green – The green wire connects to the fan. Red (C). The fan or furnace blower motor is controlled by the two left connections (green dots); the furnace limit switch which will turnoff the burner if the temperature limit is reached is controlled by the two right connections (red dots). So now we have a wire that goes through the engine bay to the cabin of your car! Locate the positive and negative wires on the cooling fan. Step 1. All u do is cut ur cable for thermo, wire ur ground to body then run a wire from the thermo positive thru ur switch then thru a fuse then to the batt. This wire may be red without an “H” attached, in some cases. so in effect you have reduced the cooling capacity of your cooling system straight away. The best way to test it is to bypass the fan's normal circuit and straight wire the fan to the engine. The Rc wire connects to the cooling system. Orange. 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