Its circuit goes from the battery positive to the fuse. 1 answer & 0 comments. From the fuse it travels to two relays: the low-speed and the high-speed relay. Check out the diagrams (Below). fan should come on when sensor is disconnected. the coolant sensor is the one operating the dash guage unless you mean the fan switch thats located on the radiator. General Diagnosis. prod: 1) ON the AC then at the connector of the aux fan … The radiator fan switch is used to control the operation of the cooling fans behind the radiator. Circuit that feeds the radiator fan switch's ‘On’ or ‘Off’ signal to the radiator fan relay. I suggest you don't ride until you get the thermal switch checked and replaced overheating your unit can do a lot of damage. Buick Century 2003, Cooling Fan Temperature Switch by Hayden®. Bypassing The Radiator Fan Switch. I had it about 2 years. TEST 3: Bypassing The Radiator Fan Switch. if the fans continue not to come on then you need to check for voltage at one of the two fans harnesses. That's a known failure item when the fans are inoperative. 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. If not, would it be the radiator temp switch in the head or a reay of some sort? It may be the fan relay or switch (whatever it is called). 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. Sounds like the thermal switch on the radiator either went bad or is unplugged. If you have voltage on both fan connectors, then the fans are bad. 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. I just replaced my fan switch with the Neuspeed 3 pole switch that brings the fans on at 80 degrees. air conditioning components. one fan is the radiator fan and the other is the a/c fan. Location Tallahassee, FL USofA Posts 1,112. I recently replaced the radiator… The switch is located about 2/3 of the way down the end of the radiator. Filter. Hayden Automotive engineers, manufactures and supplies a wide range of products designed to keep your car, truck or performance vehicle running cool. 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. Connecting the leads of your DVOM to the switch legs in resistance mode. TEST 2: Bypassing The Radiator Fan Relay. If you are encountering problems with the cooling system of your car, one possibility for it is a broken radiator fan switch. Here we're gonna' bypass the radiator fan switch with a jumper wire and see if the radiator fan motor comes on. It’s the fan motor that makes the radiator expensive. Fan #1 overide gave me a check engine light. Battery power for the radiator fan relay's coil. It was a git of a job. 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. 1-24 of 230 Results. The fans cool the radiator and the condenser. The radiator cooling fans will not come and it causes overheating. Bench Testing The Radiator Fan Relay. To test the Radiator fan thermo-switch you have to drain the cooling system, and remove the switch from the radiator. So, do not worry if the fan doesn’t immediately start working. The switch is essentially a thermostat that senses the temperature of the coolant. We think the problem lies with the radiator fan not kicking in when it should. 1980 124 radiator fan switch. I'm familiar with the one on the bottom pipe of the radiator. ambient temperature switch, a/c cut-out thermal switch, coolant fan control module. Where is the cooling fan relay (or switch) located. Toyota RAV4 1997, Radiator Fan Switch by Original Engine Management®. This last test is optional and shows you how to bench test the fan motor relay. Get the job done with the right part, at the right price. 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! The radiator fan switch is located on the lower left of the engine here is a guide to show you. Location &how to replace cooling fan switch (2003 Honda Element) fans not comming on . Re: thermo fan switch, install in inlet or outlet of radiator? Radiator Fan Cost. There's no good reason to install the manual radiator fan switch, ever. This is what... - 1999-2006 Volkswagen Jetta turn the car on, if the fans come on, then there is an issue with the temperature switch. Where is the temp fan switch? Locate the cooling fan switch near the thermostat housing on the left side of engine behind the distributor assembly. Inspect the wires and the wire connections; if they are cracked or worn, replace them with new ones. 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 Visually check the fan if you don’t hear its noise. The can and do operate independently of each other. My problem is trying to locate it. Answer. The 1980 manual says the fan fuse is 16 amps, and that was what was in the fuse location for the horn, and fan. Where is it located. 1-24 of 230 Results. Cooling Fan Switch - Radiator. 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. 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. I don't need the location of the fan relays which lay beneath the battery I … I need to know the location of three components. Both of these relays have a separate hot wire to the fan. Please let us know if you need anything else to get the problem fixed. Sign in to reply. Doing this may throw up a fault code that might clear on it's own or need to be cleared with diagnostic equipment. This is taken after the fan full-on after the 15 minutes delay. When you say faulty radiator or temp fan switch, which do you mean? A radiator fan switch regulates the cooling system of a vehicle. The inline fuse was modern 15 amp. Does anyone have any suggestions as to how to tighten the radiator fan switch without having to remove the radiator itself? 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). April 20, 2012. Standing in front and looking down at top of radiator it is the sensor on left with a gray connector. The fan doesnt come on at all, reguardless of the A/C being on or the engine over 220 deg. A radiator cooling fan on a Chevy Cavalier is controlled by the computer. This seems to be working fine as I can see the radiator outlet temp on the VCDS rising steadily with the oil temp. A radiator fan is not very expensive and can cost around $200 – $400. Items per Page. Circuit labeled with the number 4. Hi all, With regards to a 1.9 Skoda Octavia SDi 2001 model. ... Cooling Fan Switch - Radiator. The ECU signals the radiator fan to work at the precise time. (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). Battery out including the box, intercooler pipe off, map sensor disconnected, wiring moved and a deep 30mm socket from Halfords to loosen the switch. I have a 1980 fiat 124. The dripping is caused by the fluid boiling over into the overflow tank which is then over filling. … read more 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." Using a non-flammable heat source, or a pan of boiling water, place the switches brass end into the water. ... April 23, 2012. 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. I am speaking of the fan switch. (.5 -1 second). Only noticed when shut key off there is a small delay of engine stop. When the coolant temperature hits a certain point, it causes the switch to turn the fan on, which in turn reduces the coolant temperature. The a/c fan will come on when the a/c is on and the high pressure switch commands it on. 1998 volkswagen new beetle. Cooling Fan “Water Temperature switch†is located underneath the alternator. To repair or replace it, you need to know where it is located in the car. He thinks hes located the fan switch on the left side of the engine block in the water pump. I will check for power, if power is going to the fan then the fan is bad correct? The fan relays are under the hood next to the fuses. Only fan#2 can be overide. The radiator fan will work anytime the engine is hot enough for the temp sensor to command it on. 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. This ECU uses the information to decide when to switch the radiator fan on. 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. 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 … Hot (+) only with Key On Engine Off (KOEO) or Key On Engine Running (KOER). nancy, "The Fan Control Relay is bolted beneath the battery tray. 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. The fan module is located right on top of the fan shroud. Original Engine Management has the most complete line of High Quality and Value radiator fan switches. Has not blown on 10 start up's. 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. mojoem in Staunton, VA on . 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. Where is the radiator fan switch located on a Chrysler PT Cruiser with a 2.4 liter engine? Also, can someone confirm the size socket required for this? I want to replace it in an attempt to get the fans to work again. 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