Sign in to reply. I am speaking of the fan switch. If you are encountering problems with the cooling system of your car, one possibility for it is a broken radiator fan switch. Where is the cooling fan relay (or switch) located. I need to know the location of three components. The inline fuse was modern 15 amp. When the coolant temperature hits a certain point, it causes the switch to turn the fan on, which in turn reduces the coolant temperature. Part number is: 141-951-253-B The Fan Control Module is on the lower driver side of the radiator... or it can be located on the driver side lower framerail." Filter. He thinks hes located the fan switch on the left side of the engine block in the water pump. Its circuit goes from the battery positive to the fuse. I suggest you don't ride until you get the thermal switch checked and replaced overheating your unit can do a lot of damage. Get the job done with the right part, at the right price. The can and do operate independently of each other. It’s the fan motor that makes the radiator expensive. Temperature goes up fast, as soon as I drive, the fan turns off, but I can just pull in the drive way and 30 seconds later the fan comes on. 1980 124 radiator fan switch. Circuit that feeds the radiator fan switch's ‘On’ or ‘Off’ signal to the radiator fan relay. The switch is located about 2/3 of the way down the end of the radiator. Location Tallahassee, FL USofA Posts 1,112. I'm familiar with the one on the bottom pipe of the radiator. 1 answer & 0 comments. TEST 2: Bypassing The Radiator Fan Relay. I will check for power, if power is going to the fan then the fan is bad correct? The fan doesnt come on at all, reguardless of the A/C being on or the engine over 220 deg. The fitter thinks because the fan is kicking in, he coolant/water is overheating and spraying out the reservoir as steam being too hot and too much pressure. Bypassing The Radiator Fan Switch. If you have voltage on both fan connectors, then the fans are bad. Model depending of course 855 T-5 RHD Blue: MBC, Custom Map based on Rica, K&N Filter, 18T Turbocharger, White/Green injectors [depends on my mood], Blue Silicone vacuum hoses A radiator fan is not very expensive and can cost around $200 – $400. The radiator cools the engine and the fan cools the radiator, so the fan should cool the radiator when the coolant Exiting the radiator, going into the engine, is too hot, like it is from lack of air flow. Toyota RAV4 1997, Radiator Fan Switch by Original Engine Management®. Items per Page. Circuit labeled with the number 4. It may be the fan relay or switch (whatever it is called). A radiator fan switch regulates the cooling system of a vehicle. When you say faulty radiator or temp fan switch, which do you mean? BTW, pulling AC relay is a good idea, may be the AC wire signal can be route and control by a switch inside the car. Battery power for the radiator fan relay's coil. Both of these relays have a separate hot wire to the fan. Symptom of a failed Water Temperature switch: When the engine is cool and AC is turned off, the radiator fan will Turn on immediately when the ignition switch is turned passed ACC to the ON position. I don't need the location of the fan relays which lay beneath the battery I … Cooling Fan Switch - Radiator. prod: 1) ON the AC then at the connector of the aux fan … Where is the radiator fan switch located on a Chrysler PT Cruiser with a 2.4 liter engine? That's a known failure item when the fans are inoperative. Please let us know if you need anything else to get the problem fixed. My problem is trying to locate it. This seems to be working fine as I can see the radiator outlet temp on the VCDS rising steadily with the oil temp. Standing in front and looking down at top of radiator it is the sensor on left with a gray connector. A-Team Performance Electric Cooling Radiator Fan Relay Kit With Thermostat Installation Hardware Wiring Set 180 to 200 Degrees Temp Sensor Temperature Switch 40 Amp Relay 4.3 out of … The a/c fan will come on when the a/c is on and the high pressure switch commands it on. … read more Visually check the fan if you don’t hear its noise. 1-24 of 230 Results. Re: Location of radiator fan switch Post by mitch13 » Wed Jul 03, 2013 12:40 pm Hi, I've taken the van to the auto electrician today, you are right about the fan coming on when the switch is disconnected, he told me the same thing i.e. if the fans continue not to come on then you need to check for voltage at one of the two fans harnesses. The wires connected from the fan to the module could wear and crack due to the heat in the engine compartment, along with rough weather conditions. I have a 1980 fiat 124. This is what... - 1999-2006 Volkswagen Jetta The radiator fan switch is located on the lower left of the engine here is a guide to show you. ... Cooling Fan Switch - Radiator. Recently, I was driving my 2015 Jeep Wrangler JK Unlimited through a parking lot on a 95 degree day, and after leaving a stop sign, a check engine light flashed on (later I would learn it was a P0480 Cooling Fan Relay 1 Control Circuit), and shortly thereafter my Jeep overheated. Does anyone have any suggestions as to how to tighten the radiator fan switch without having to remove the radiator itself? one fan is the radiator fan and the other is the a/c fan. Doing this may throw up a fault code that might clear on it's own or need to be cleared with diagnostic equipment. Only fan#2 can be overide. To test the Radiator fan thermo-switch you have to drain the cooling system, and remove the switch from the radiator. mojoem in Staunton, VA on . Hot (+) only with Key On Engine Off (KOEO) or Key On Engine Running (KOER). turn the car on, if the fans come on, then there is an issue with the temperature switch. Where is it located. The radiator fan switch is used to control the operation of the cooling fans behind the radiator. ... April 23, 2012. I recently replaced the radiator… There's no good reason to install the manual radiator fan switch, ever. The fans cool the radiator and the condenser. Inspect the wires and the wire connections; if they are cracked or worn, replace them with new ones. The radiator cooling fans will not come and it causes overheating. Here we're gonna' bypass the radiator fan switch with a jumper wire and see if the radiator fan motor comes on. April 20, 2012. Buick Century 2003, Cooling Fan Temperature Switch by Hayden®. Original Engine Management has the most complete line of High Quality and Value radiator fan switches. Sounds like the thermal switch on the radiator either went bad or is unplugged. Locate the cooling fan switch near the thermostat housing on the left side of engine behind the distributor assembly. fan should come on when sensor is disconnected. Also, can someone confirm the size socket required for this? The dripping is caused by the fluid boiling over into the overflow tank which is then over filling. From the fuse it travels to two relays: the low-speed and the high-speed relay. Where is the temp fan switch? (.5 -1 second). Using a non-flammable heat source, or a pan of boiling water, place the switches brass end into the water. Check out the diagrams (Below). nancy, "The Fan Control Relay is bolted beneath the battery tray. TEST 3: Bypassing The Radiator Fan Switch. ambient temperature switch, a/c cut-out thermal switch, coolant fan control module. To repair or replace it, you need to know where it is located in the car. Bench Testing The Radiator Fan Relay. The fan relays are under the hood next to the fuses. Has not blown on 10 start up's. Fan #1 overide gave me a check engine light. The fan module is located right on top of the fan shroud. I just replaced my fan switch with the Neuspeed 3 pole switch that brings the fans on at 80 degrees. One fan should come on when you run the A/C and the other fan should come on when the car gets over 190 degrees. Re: thermo fan switch, install in inlet or outlet of radiator? The switch is essentially a thermostat that senses the temperature of the coolant. Answer. I had it about 2 years. The 1980 manual says the fan fuse is 16 amps, and that was what was in the fuse location for the horn, and fan. If not, would it be the radiator temp switch in the head or a reay of some sort? Battery out including the box, intercooler pipe off, map sensor disconnected, wiring moved and a deep 30mm socket from Halfords to loosen the switch. 1998 volkswagen new beetle. Pretty much the only way it should be installed (I'd use tape instead if you can't stand a gauge that acts like a gauge) is so when you activate the switch it activates the radiator fan relay (some years may require something to fool the PCM into thinking it's off to avoid a CEL). General Diagnosis. A radiator cooling fan on a Chevy Cavalier is controlled by the computer. (very common on Maxima's) if you don't get any power to the fans then it is going to be the fan relays. Power provided by fuse #4 (7.5 Amp) of the left side dash fuse box (see image 4 of 4). It was a git of a job. the coolant sensor is the one operating the dash guage unless you mean the fan switch thats located on the radiator. Connecting the leads of your DVOM to the switch legs in resistance mode. The ECU signals the radiator fan to work at the precise time. Cooling Fan “Water Temperature switch†is located underneath the alternator. So, do not worry if the fan doesn’t immediately start working. This is taken after the fan full-on after the 15 minutes delay. If you run the engine and unplug the coolant sensor, the ECU should permanantly run the fan as a default setting due to loss of coolant temperature signal. This ECU uses the information to decide when to switch the radiator fan on. We think the problem lies with the radiator fan not kicking in when it should. Find our best fitting cooling fan switch - radiators for your vehicle and enjoy free next day delivery or same day pickup at a store near you! Radiator Fan Cost. Only noticed when shut key off there is a small delay of engine stop. This last test is optional and shows you how to bench test the fan motor relay. 1-24 of 230 Results. Hayden Automotive engineers, manufactures and supplies a wide range of products designed to keep your car, truck or performance vehicle running cool. 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. The radiator fan will work anytime the engine is hot enough for the temp sensor to command it on. The electric cooling fan switch is installed into a coolant passage of the engine near the thermostat housing and operates the radiator electric cooling fans when the coolant temperature reaches a specified temperature. Hi all, With regards to a 1.9 Skoda Octavia SDi 2001 model. 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. air conditioning components. I want to replace it in an attempt to get the fans to work again. 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