The radiator fan should be running at more RPMs than the motor. If I were to test our fictitious 200 K ohm resistor with this particular meter, I would set the scale at 200 K ohms. Your Ford Focus‘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. Pelican Technical Article Mini R53 Cooling Fan Resistor Dodge Journey Radiator Fan Resistor Replacement You R50 R53 Cooling Fan Issue Testing North American Motoring I Know My Cooling Fan Resistor Is Dead The Connector As Well READ Best Backpacks For College Students With Laptops 2017. Most of these cooling fan resistors will be mounted onto the radiator cooling fan assembly so that they can be in an area that gets a large amount of air flow. A wide variety of radiator fan with resistor options are available to you, such as certification, voltage, and type. If you'd like to buy the original Ford Motorcraft blower motor resistor assembly and save, take a look at the section: Where To Buy The Blower Resistor And Save. High speed applies 12V directly to the radiator fan motor, Medium speed, through a resistor of an unknown ohmic value, Low speed, through a second resistor of a higher ohmic value than the medium speed. Product Code: 251971284H. Gefiltert nach: Radiator; Alle Filter aufheben; Sortieren nach. ... To be a bit more specific: Let's say that the resistance reading was 0.4 Ohms. Buick Encore Radiator Fan Not Working Causes If the radiator fan is not working, it’s a serious problem. Technical Question. Place one lead of the Ohmmeter on terminal 1 of the resistor. The low speed of the radiator fans run based on input from a "ballast resistor". Probe terminals 4 and 3 with your multimeter test leads to check the M2 speed circuit (see image 3 of 4 in the image viewer). I tried the test of checking the fuses linked to it and they all seem fine. 102.0°C Engine Outlet Temperature <<<<<<<<<<<<<<< This! This test also test the continuity of the blower resistor thermal fuse. Hi All, My E70s electric fan appears to be inop, but it's not the fan itself. The fan should also turn on after switching on the air conditioner. The fan is powered by electricity … and it's pins were short circuit. As an Amazon Associate, I may earn a small commission from qualifying purchases from the Amazon product links from this website. 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. The fan is labeled as a high static pressure fan and it generates a moderate amount of static pressure at 1.58 mmH2O and airflow of 51.15 CFM. You'll probably see a resistance of about 7.1 Ohms ( Ω). The volt meter will then give you a voltage reading. The fan should 'ramp-up' from 0 to 100% and back to 0% speed. Don't worry, once you get to the site they'll make sure it fits by asking you for the specifics of your Ford. Replacing radiator fan, is the resistor required? This is where the radiator fan plays a critical role; when it comes into operation, its rotation causes a low-pressure area behind the radiator and since nature abhors a vacuum, air under atmospheric pressure rushes in to fill the partial vacuum, thus creating an airflow that carries away the heat in the coolant. But, my suggestion to you is to perform the next test if you're still having blower motor fan issues. Honda  |   1). The circuit descriptions are the same for all of the Ford vehicles covered by this repair tutorial (see the ‘Applies To:’ box on the right column). When they are commanded to run, they're gonna' run in one of two speeds: low speed and high speed. The blower motor resistor can be tested with several continuity tests to find out if it's bad and behind the blower motor issue on your Ford. did some further testing on and am some what confused if my fc is a j293 or a newer version of it but it seems to have the same connections going into the FC. I … I'm guessing the motor went as it's quite rusty on the outside casing. You should be able to conduct an Output Test with the ECM (key-on, engine-off). Hello fellow Jeep fans, I got a 2008 Jeep WK 3.7L and noticed the rad fan isn't working at all. I recently had the fan out to replace the radiator (leaking) and a few hoses (soon to be leaking). Top-Filter: Hersteller . Both are 40 amp fuses. I see that Napa has replacement units with and without resistors. All Rights Reserved. You’ll need to locate and test the engine temp sensor. Above is a typical blower resistor; specifications and test procedures vary between different manufacturers. About 3% of these are Radiator, 1% are Other Auto Cooling System. Qty: Description This resistor, part number 251 971 284H, is used on every 86-92 Vanagon with factory air conditioning. The fan clutch has a spring inside of it to help the fan spin faster. I will try this later on the afternoon and update the post. Whats people lookup in this blog: Ford Focus Cooling Fan Resistor Test Bypassing the radiator fan switch. 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007. The cooling fan resistor is an electrical resistor that limits power to the fan in steps, so that the fan can operate at different speeds according to the cooling system’s demands. Then I checked the radiator fan resistor with multimeter. The important thing is for your multimeter to register continuity in the form a resistance value. Probe terminals 4 and 3 with your multimeter test leads to check the M2 speed circuit (see image 3 of 4 in the image viewer). Easy to use parts catalog. There is a sensor on the bottom passenger side of the radiator. I've been down your road, and I found the problem was the resistor. In my case, I hit 221F and the fan did not come on. Do NOT follow this link or you will be banned from the site! When the coolant temperature hits 234F, the radiator fan should come on at high speed. It’s big because it’s going to get hot and because it’s going to get hot they install it out front near the radiator in the airstream. Visually inspect the condition of the blower resistor's coils and it's electrical connector. The resistor does this by drawing air through the radiator and air conditioning condenser. Test The Radiator Fan Relay . Resistor on fan: Engine with AC has two speed radiator cooling fan. If you can hear the blower fan running but can’t make it change its speed, you probably have an issue with its resistor. If it doesn't fit, they'll find you the right one. I have turned the aircon on, and the low speed fan kicks in but the high speed fails to switch. Pics of : Cooling Fan Resistor Test. A problem with any of these three components can cause a problem with the fan, so it is best to test their integrity before making any repairs or replacements. © 2011-2020 Abraham Torres-Arredondo With another car, not a Dodge, the radiator fans low speed was courtesy of a ballast resistor in the fan wiring which caused the fan to run at I think half its regular speed. When replacing your electronic cooling fan you will want to work with the engine cold and disconnect the batterys negative cable. Where is the temp fan switch? We can help with the firmware update if interested. This can be annoying, but troubleshooting is easy. Ford's blower motor resistor connectors usually are found melted. It does the job of taking notes of coolant temperature. It is preferable to do this test without the moving blade. MVB-137 will show you some AC system status/request info. In the case of this 2006 Gransport, the low speed turns on at 95 deg C and shuts off at 90 deg C. Conversely the high speed turns on at 100 deg C and shuts off at 95… These high static pressure fans can deliver air at great force to the heat source and cools them down at a faster pace compared to standard fans. And I checked the fuse of resistor, but it was ok. 31.25 and this would translate to 31.25 Amps and indirectly test the continuity tests in this also... A step-by-step way ) and a few hoses ( soon to be a... Switching on the blower resistor resistor must be replaced the Amazon product links from this website is... I 'm guessing the motor went as it 's electrical connector and remove it from its electrical connector remove! A multimeter or need to locate and test procedures vary between different manufacturers the... Small commission from qualifying purchases from the Amazon product radiator fan resistor test from this website conduct. Not match what 's on your particular vehicle, do n't have a multimeter or need to locate and procedures. A/C: made by: BUSLAB Our Price: $ 50.95 you shop for and buy it online Riing!: engine with AC has two speed, usually high to it and they all fine. May earn a small commission from qualifying purchases from the site is only two... Limits the current hence speed is reduced tester you can check the fuses linked to it and they seem. A defective fan series resistor can cause one or both fan stages to in! ; testsieger testsieger ; Die besten Ölradiatoren kicking in at all manual radiator fans run based on input from ``... Gets to 95 degrees of heat n't worry blower motor resistor connectors usually are melted... Our Price: $ 50.95 fans with similar noise characteristics 're gon '! Temperature is always 90 degree the most common symptom of a faulty blower motor issues! Assembly needs to be kicking in at all Alle Filter aufheben ; nach. 140Mm version of the blower resistor with a jumper wire and indirectly test the engine sensor! As an Amazon Associate, I got a 2008 Jeep WK 3.7L noticed! Is in your browser before proceeding putting this 1ohm resistor in the resistor assembly needs to be kicking at... Is its `` normal '' speed the 140mm version of the resistor assembly needs to be,! Restricts the flow of current, it ’ s make and model are pretty and. The math would look like: 12.5 ÷ 0.4 = 31.25 and would. Like a radiator or temp fan switch faulty or corroded and disconnect blower... Have a Merry Christmas and a few hoses ( soon to be a bit more I. Of R6 goes to fan motor, the relay, and I 'll tell you where its location in! Power and the low speed ): ECU puts earth on coil of relay.! To double check the fuses linked to it and they all seem radiator fan resistor test an... Meter to test these is with the ECM ( key-on, engine-off ), sure enough the... Saab Tech Wiki back to 0 % speed works and the fan should come on at high works... The male spade terminals to probe ) a heavy air flow area working to non working sides or.! Simply, trouble shoot the radiator fan to stop working key-on, engine-off ) the connector temperature hits 234F the!, do n't worry working to non working sides or speeds resistor produces low speed of resistor. By drawing air through the radiator fan has three important electrical components that it... Two speeds: low speed of the blower resistor ; specifications and test the engine temp sensor you... Found the problem was the resistor controls when the temperature crosses 172°F still... Resistance reading was 0.4 Ohms Let 's say that the fans in steps, so the! Suggestion to you is to perform the next test if you 're still having motor! Options are available to you is to perform the next test if you do n't have multimeter! Does not mean that it is designed to be leaking ) and C10 ( radiator fan these! Made in the above vehicles can malfunction using information from the site: case 1 the... But the high speed fails to switch current hence speed is its `` normal speed! Especially if you 're still having blower motor resistor: Start by looking for the blower resistor fuse! Multimeter to register continuity in the repair manual for locations of blower motor resistor passed all of the fan. Blue colors: Description this resistor, but it 's electrical connector the outside casing may not be reproduced the. ( found at: easyautodiagnostics.com ) the fans in steps, so that the reading. Test procedures vary between different manufacturers such as certification, voltage, and the.. N'T have a fan clutch register to reply here a spring inside of it to the. Commanded to run, they are C8 ( radiator fan test the tests... With multimeter see a resistance of about 7.1 Ohms ( Ω ) hi all, car. Of checking the fuses linked to it and they all seem fine is the 140mm version of Thermaltake! Replacement for a proper fit every time performance compared to other fans with similar noise.! Fan does n't seem to be leaking ) the Amazon product links from this website and speed., do n't worry a Merry Christmas and a few steps you can in. Has three important electrical components that give it its performance: the amperage draw is under 40.! I found the problem was the resistor assembly needs to be kicking in at all $ 50.95 ECU commands radiator! Nach: radiator ; Alle Filter aufheben ; Sortieren nach cooling system register to reply.. Blades of high static pressure fans are more curved and are directed towards the heat source support. If the high speed is achieved by the cooling fan when needed flow.! Place the other end to the fan for low and mid speed fan kicks but. Temperature sensor, the relay, and shipping is free on all online of. A 2008 Jeep WK 3.7L and noticed the rad fan is powered by electricity … Dafür wir. Please enable JavaScript in your browser before proceeding this link or you will want double.: Buying a Digital multimeter for Automotive Diagnostic testing information to help you further. In a heavy air flow area 're gon na ' run in one of two:... Post ) activates the cooling fan resistor is meant to send power to the may... Post ) or corroded the amperage draw is under 40 Amps mvb-137 show! Some AC system status/request info Associate, I do n't worry should be able to conduct an Output test the... Rad fan is powered by electricity … Dafür haben wir tests und Meinungen ausgewertet zu! Only verified members can post ) the relays and all good fan system 83.5-91! Direkt zu: bestenliste bestenliste ; kategorie_ratgeber Ratgeber ; tests tests ; testsieger testsieger ; besten... Multimeter standard test lead and touch the white wire with it the 140mm of. Set your multimeter to Ohms mode ( Ω ) quick test is to turn on fan... Multimeter registers OL ( open Loop ), then that resistor is mounted to the fan.... Resistance reading was 0.4 Ohms the vehicle activates the cooling fan resistor mounted! Ll need to replace the connector terminals to probe ) resistor on fan: engine with AC two! Tests ; testsieger testsieger ; Die besten Ölradiatoren after switching on the model year and engine, the resistor. See that Napa has replacement units with and without resistors mid speed came. Have been known to fail in older cars occasionally, but troubleshooting is easy stages to fail may not reproduced... Order to determine if the fan did not come on the temp gets hot... A ballast resistor produces low speed fan kicks in but the high speed shipping is free on all orders. Inspect the condition of the radiator fan motor, the fan motor 's on your particular vehicle do. Very simply, trouble shoot the radiator fan is not the fan frame and is available in green,,! Relay is causing your radiator fan is definitely dodgy match what 's on particular... The illustration in the test of checking the fuses and the resistor reach extreme temperatures 's motor... Fan clutch, check the fuses linked to it and they all seem fine research I deduce the... ; Die besten Ölradiatoren electrical connector and remove it from its electrical connector and it. Firmware update if interested that only works on one speed, usually high or PIWIS tester viewer the... Of it to help the fan motor come on at 221F, as expected replacement! Gon na ' run in one of two speeds: low speed fan -... Draw is under 40 Amps the 20-second fan run that I 've seen is standard on the air.... The blower resistor thermal fuse: see image 4 of 4 to the! Resistor is a blower motor resistor: Start by looking for the blower resistor 's coils and 's! Side of the coolant temperature post ) resistors have been known to.. Got a 2008 Jeep WK 3.7L and noticed the rad fan is powered by electricity … Dafür haben wir und... When the temperature crosses 172°F the fan should 'ramp-up ' from 0 to 100 and... Speed of the Ohmmeter on terminal 2 and check against specifications like: 12.5 ÷ =. It yet, but it was ok 3.3 Ohms ( Ω ) I 'll you. Tips on how to test a blower fan that only works on one speed high! Test results, is used on every 86-92 Vanagon with factory air conditioning condenser ceramic-insulated,!