A coolant fan switch is a small and very simple switch comprised of typically two wires. Look for a rubber grommet in back wall (firewall) of engine compartment that has wiring going through it. if the fans continue not to come on then you need to check for voltage at one of the two fans harnesses. Based on PCM operating parameters received over the CAN-C BUS the TIPM turns on the Radiator Fan Control Relay, which exits the TIPM and powers the right fan motor. Both fans ground receive ground at G109 located on the right radiator support. 1st fan to the left is the rad that controlled by thermo switch and the second fan is an aux fan and will only ON when AC is ON but as they says you can put a manual switch on it to be able for you to manually ON. This one is here, sometimes they are on the top of the motor housing. Last Updated on Tue, 17 Mar 2020 | Toyota MR2 MK2 1991 SW20. AM2 7.5A. Decide on best location to install switch and drill hole to accommodate the installation. The thermostatic switch at the bottom of the radiator operates this relay. The other 3 do. It is protected by fuse f5 (125A) located in Front pre-fusebox F32. The first step in adding a switch to a radiator fan is to disconnect the battery's negative terminal. The cooling fan control module is located at the front left of the engine compartment next to the radiator. That's a known failure item when the fans are inoperative. turn the car on, if the fans come on, then there is an issue with the temperature switch. Fuse. the fan switch and relays need to be checked. Location Of Radiator Cooling Fan Components. Switch. You have two relays for fan controls, one located off of the wiring loom between the fans and one additional near the upper radiator hose off of the same loom. The electric suction fan (engine & a/c) with integrated control (M4/7) is driven from ME-SFI control module [ECU] N3/10. The temperature sensor is located to the right of the valve cover, facing the engine compartment. HiCustomerthis is lostrider, the electric cooling fan relay is in the CCRM, thats the constant control relay module located in the engine compartment,by the air filter housing, That relay is not replaceable unless you replace the CCRM, here is the wiring diagram for the module and its location… You can unhook the wires to the fan, and hot wire it to test the fan motor, and then follow the wires from the fan back to the relay, and from the relay back to the thermo-switch (temp sending unit) which is usually located in the top portion of the engine, and most of the time around the water outlet that houses the thermostat. ALT 120A. Access is pretty tight here, but it is possible to remove the switch. OK then what i would do is check the fuse i mentioned and make sure its good, then find the temperature switch located on the radiator and pull off the connector. 1 Radiator Cooling Fan. Parts location. The Norcold fan sensor/switch can be attached to the absorber coil with a typical hose clamp. The original is a 10 amp (as shown in Clymer manual) however the parts guy at the dealership told me that many of these were found to be under rated which makes sense because the fuse for the fan is a 20 amp and the relay is a 50 amp. The cooling fan switch is located in the passenger side cylinder head between cylinders number six and eight spark plugs. Check cooling fan operation at low temperatures (below 94°c (201°f)) Turn the ignition switch on with the a/c switch off. AM2 7.5A. Now turn your fan back on and enjoy. The cooling fan is turned off and on as needed by the engine's control computer based upon information from the coolant temperature sensor. The A/C relay is in the center next to the radiator fan relay, and the horn is the one on the left end in the row closer to you. @alexander31 The Fan Control Relay is bolted beneath the battery tray. Hint: It is normal for the cooling fan to sometimes rotate when the ignition switch is turned from acc to on. Make sure your fan has come to a complete stop before flipping the direction switch in the opposite direction. The cooling fan relay is usually located in the phytyl and the centre of the relay or mounted in the electric fan behind the radiator. Fan Main Relay ("FAN MAIN") Cooling Fan Relay. Turn off your ceiling fan and locate the direction switch on the motor housing. There's a relay involved in the engine cooling fan circuit. For High Speed - Power from fuse 12 provides power to the Radiator Fan Control Relay, power from fuse 15 provides power to the Radiator Fan High Relay. Fuse. . It's easiest to use a … The cooling fan relay is the relay that controls the engine’s cooling fans. Guess you can follow the radiator piping and it should lead you to thermostat location and the fan switch should be somewhere nearby. Water Temp. If your radiator fan is not working you should test it first by either turning on the AC, jumping the relay, or hot wire it from the battery terminals. Your Jeep Liberty‘s radiator fan has one of the most important jobs on the vehicle.It is the last line of defense between you and an overheating engine. When the engine coolant warms up sufficiently, this switch opens and diverts electric current through the relay coil of Fan Relay No. Check that the cooling fan stops. Hyundai overheats If the radiator fan relay is activated and the ECM detects that the fan can’t provide adequate cooling, it will activate the condenser fan relay to provide supplemental cooling. Let's Get It Fixed! ALT 120A. It doesn't look like the main fuse box has a relay for the cooling fan, but from what I'm reading there is a relay controlling the fan located somewhere else. If the radiator fan is not working, it’s a serious problem.. Just because the radiator fan is not on does not mean that it is not working. Just disconnect the sensor and the computer activate the fans, connector usually is green. the relay center under the hood ha … The radiator fan switch is located on the lower right hand side of the radiator on the engine bay side (looking towards rear of car). 1 Radiator Cooling Fan. The relay switch should be labeled as such. I'm not sure where this relay is located, but I'd try looking on the left inner front fender (iirc, there a few relays located here). The thermo switch (also called the cooling fan switch) sends a signal to the cooling fan, so the fan turns on if the coolant gets too hot. Also - check the fan motor wiring connector to make sure it is not melted or damaged in any way. A faulty coolant temperature sensor may result in a fan not being properly used, which may cause the engine to overheat. Next you have 4 relays your engine compartment box. The lower absorber coil in some applications may get too hot, therefore the ARP fan sensor can be clamped to the second coil from the bottom if this is the case. Fan Main Relay ("FAN MAIN") Cooling Fan Relay. This switch is configured to work based upon the temperature of the engine. The coolant fan switch is the located in lower part of the radiator by the compressor, some other Camry's the put it by the other temp switch by the head, between the air box and the cylinder head. Most modern vehicles use electric cooling fans to help pull air through the radiator so that it can keep the engine cool. Where is it located so I can check it? Where is the cooling fan relay on a 1996 Mercury Tracer wagon? The Fan Control Module is on the lower driver side of the radiator... Or it can be located on the driver side lower frame rail." You also have a temp sensor that supplys info to your pcm, that is located just by the oil fill cap next to two pipes. NOT the fan switch as I had been told by someone else. No. On-vehicle inspection. Our virtual experts can diagnose your … The relay switch should be labeled as such. One of the most important systems to monitor is the cooling system, which includes the radiator, water pump, radiator fan, coolant lines, and overflow tank. The 1984 Corvette has a standalone cooling fan control circuit. No. olds 88: i have a 92 olds 88 royale the radiator fans do not i have a 92 olds 88 royale the radiator fans do not work. Most cooling fans use electric motors that have a moderate to high current draw, and as a result are commonly controlled using relays. The switch is connected directly to the cooling fan relay without any engine computer intervention. If the fan switch relay is giving off the appropriate readings and is in working condition, move on to the next step. Initiation is from the coolant temp sensor (B11/4) but fan speed variation is managed within M4/7. The CCRM (constant control relay module) which operates the fan is located near the drivers side shock tower. ... thought is the sensor on top but later realised that sensor is for water pump so my last guess is the sensor below the radiator which controls the fan. 1984 COOLING FAN SWITCH INSTALLATION. I know where all the fuses and relays are, and the diode. Check/replace the radiator fan relay, which is usually located in the under hood fuse/relay box. There may be 2 sending units located there with the single terminal sending unit being for the temperature gauge on the dash. The cooling fan relay switch can be located on the back of the cooling fan motor. Use a small screwdriver to press the tab on the electrical connector (green arrow) and pull it off the switch… my problem is I don't know where they are located on the car. All I need to know is WHERE is the cooling fan (radiator fan) Switch is located on a 2006 Pontiac grand prix V6??? Part number is: 141-951-253-B. Cooling Fan Switch 1 Answer. If the radiator fan runs all the time, the ECT Switch will likely show continuity below 189 degrees F. This situation will, also, require replacing the switch. The cooling fan relay switch can be located on the back of the cooling fan motor. 1, which results in low speed operation of the radiator fan. Step 2 – Check the thermo switch. Water Temp. prod: 1) ON the AC then at the connector of the aux fan look for the wire that has the positive supply. Also, my blower motor resistor seems to be going bad since the 2nd speed on my AC selector switch doesn't work. System diagram. relays is to your right, and the fuses are to your left the radiator fan relay is the one on the right side end, in the row farther from you. Alternately, a refrigerant pressure switch is also located within the same wire, in order to open and achieve the same result. Readings and is in working condition, move on to the next step I had been told someone... 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