See Contact Test in Step 1. A radiator fan is not very expensive and can cost around $200 – $400. In the above schematic the item number 5 is the Fan Motor Assembly part number 19030-MAA-023. If it does not, check the cooling fan relays and engine coolant temperature sensor, and then check for disconnection of the connector or a wire break between the cooling fan relay and engine coolant temperature sensor. This switch is configured to work based upon the temperature of the engine. Get a test light or a 12 volt tester and check the three holes that are in the plug end that plugs onto the fan switch at the radiator. Turn the ignition switch on with the a/c switch off. Thermostatically controlled motors do not work the fan until the engine coolant rises above normal operating temperature, and then switch off when it has cooled down again. Fan will work by jumping straight from the battery or by jumping the two wires together that are plugged into the sensor on the radiator.According the my … A cooling fan module helps to maintain a constant supply of fresh air into the cabin of a car by controlling the blower that supplies the air. Turns out my fan motor is fine. 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. Cooling Fans Thermal Switch The cooling fans thermal switch (sometimes referred to by its manufacturers name, 'Otter' ) is fitted in to a waterpipe between the thermostat outlet and radiator inlet , using a special grommet and spring clip . It was a git of a job. If you turn the a/c on you should be able to test the wiring and see that there is voltage at the orange, red, and pink wire. Radiator Fan Cost. If you can do this test, I can fruther help you troule shoot this circut. This is a test. I just replaced my fan switch with the Neuspeed 3 pole switch that brings the fans on at 80 degrees. For more information about how to test a fan clutch, such as other signs to look for which indicate damage, read on. PCM (Powertrain Control Module = fuel injection computer). Connect the high amp clamp to PicoScope Channel B, zero the clamp before inserting into the fan power supply circuit. Older Volvos had a separate water temperature sensor at the radiator. How do I test my radiator fan switch to make sure it turns on at the right temp? Remove the radiator fan relay from the fuse and relay box on the fender well. The inputs the computer uses to decide how fast to spin the fan are: Radiator outlet temperature Catalyst temperature (calculated temperature) Vehicle speed Battery voltage A/C pressure (calculated pressure) To troubleshoot: check computer for any set codes unplug the fan connector and test for voltage on the two large wires. It's not under "cooling system" or "troubleshooting", it's under "switches" page 19-10. These do not. Things to look for #2. Here is how to test if the fan is functioning properly: Unplug the radiator fan connector. Thank you for the reply! ( Note: if the circuit is computer controlled a delay could be programmed into the operation of the accessory, additionally if a cooling fan is being tested the engine must reach operating temperature before the computer will trigger the circuit.) Turned the car on and left it running for a bit. Fans should come on immediately at low with A/C switch engaged. Here’s how to tell if your cooling fan isn’t working, what you should do about it and what the problem might be. The coolant temperature fan switch/sensor at the bottom of the radiator is new and works as it should in another similar Camry (I switched it out to test). [If you can't find the fan circuit test lead near the ECU, you may not have the coolant recall fan modifications.] BRAND. If anyone else needs to know, you just unplug the connector from the switch/sensor on the bottom of the radiator and use … 1 - Radiator Cooling Fan Relays Testing The fan can be tested with the engine on or off (but preferrably off), by removing first the "Fan Low" relay, and putting a test lead, or a heavy wire jumper between relay socket contacts #30 and 87. If the relay is working, the fan should be operating. The new Hypertech temperature switch turns the fan on at a much-improved 195 degrees and the tuning chip would help ... all hoses were connected and the radiator was filled it was time to test it. Use Code: DIYSAVE10 Online Ship-to-Home Orders Only. I now have a rocker switch in parallel to the temperature switch to act as a test/back-up. What you need to do now is pull out a voltmeter and test the voltages at the wires coming into the cooling fan … The resistors reduce power to the fan, so when the coolant is not quite at operating temperature, the selected resistor will pass a reduced current to the fan, causing it to rotate at a “low-speed” setting. The light green wire is what turns the relay off and on. Watch this video to figure out how to diagnose problems with the cooling fan relay on a Chrysler. If so, a replacement fan costs upwards of $45. In these designs, the fan switch is a little more complicated than on single-speed fan systems, but instead of supplying current to a relay, the switch feeds power to resistors. Cooling Fan Switch - Radiator. I overheated at the beginning of the season, and finally almost am ready to get back on the road after a replacement engine swap.I thought my fan was faulty, but both it and the replacement I just got work fine. Electric radiator-fan motors are switched on either by the ignition switch - and run while the engine is working - or by a thermostatic switch. Check that the cooling fan stops. Answer: Make sure there’s proper outside air flow through the radiator or condenser (usually bugs clogging passages). Radiator fan switch. Battery out including the box, intercooler pipe off, map sensor disconnected, wiring moved and a deep 30mm socket from Halfords to loosen the switch. The ECU signals the radiator fan to work at the precise time. Then test the fan clutch by giving it a good push. The temp increased to to 109C and the radiator fan didn't kick in. This problem has apparently also surfaced in the GS. The cooling fans on Chrysler cars are not particularly well-made, but that doesn't mean you can assume that they are broken the second the cooling system stops working. Radiator Fan Coolant Switch: How do you test? The old 4 wire motors have quite a short life and fail between 60 - 80k miles. Check the online microfiche for part numbers. Filter. The radiator is typically inaudible from the driver's seat, so a simple test to see whether it is working correctly, is to switch on the engine and allow it to idle for 45 minutes. If the fan clutch requires repair, take the vehicle to a qualified mechanic. If the fan starts to spin, the motor is good. Now repeat tests 1 and 2 with the A/C switch engaged and blower motor at speed 1. Cooling Fan Switch - Radiator. Visually check the fan if you don’t hear its noise. Address 01: Engine (8E0 909 518 AF) 20:40:48 Group 134: Engine Cooling (Temperatures) 94.0°C Oil Temperature 27.0°C Ambient Temperature 45.0°C Intake Air Temperature (G42) 102.0°C Engine Outlet Temperature 20:40:48 Group 135: Engine Cooling (Fan Activation) 90.0°C Radiator Outlet Temperature 17.3 % Fan 1 Activation Duty Cycle 20:40:48 Group 137: Engine Cooling (Air Condition … HOW TO TEST RADIATOR FAN SPEEDS FROM TRINARY SWITCH (DIESEL CDT/i, 1.8 & KV6 Variants. Once the temperature reaches this cooling stage, the coolant fan will shut off. Test the relay terminals for power with the ignition key off (use the voltmeter). So, do not worry if the fan doesn’t immediately start working. Installed the fan motor switch/sensor tonight, ran it up to temp and the fan kicked on when the gauge was at about 60% hot, so the fix was successful, now I'm going to back-clean the radiator with a garden hose, put it back together and run it hard, see what happens. Connect PicoScope Channel A. to the fan switched earth circuit. No codes are present, water is flowing through radiator so pump is good but witout air from fan the car eventually displays engine temp high, drive moderatley , but fan never turns on.....thinking has to be the fan but need to be sure. This means that the radiator fan switch turns on the radiator fan relay... which in turns activates the radiator fan motor. After several requests from members, thought I'd put it here for reference. If it spins more than three full rotations, this indicates that it may be prone to slipping. CRP/Rein (2) Duralast (177) Facet (34) Santech (8) URO (7) Valucraft (2) Show less. Bill. Now start the vehicle and operate the accessory switch, the test light should illuminate, if not the switch or circuit ground has shorted. If it stops working, your engine could overheat and be damaged. Normal engine temperature is achieved within 30 minutes of idling, and within 45 minutes, sufficient heat should build within the cooling system to require additional cooling via the radiator. Switch must be bad. They're right under the thermostat housing, as others described. Items per Page. The radiator fan itself may be faulty. I've put my Mini dashboard computer in to test mode and got it to display the water temperature on the display. Fig. Other than buying a new fan at 275.00 there has to be a way to know if its bad I would hope. The radiator fan switch closes above 199°F (93°C). Use manufacturer data to identify the cooling fan circuit functions. Once you get the radiator fan system set up properly it is all done automatically. If it's the same as in my Peugeot 306 (1997) you have to unplug the wires from the therminal-switch witch is located on the radiator. edit- the bike is an 05 Honda VTX 1800F. 1-24 of 230 Results. The coolant fan will continue to run until the engine temperature cools down to a specific predetermined level. If you have a new fan switch then we can pretty much rule that out. Minimize the help page. 1-24 of 230 Results. Check also the Thermistor is working. There will be one terminal that has power with the key off. This is a DIY test with No T4 TESTBOOK required !! Both the thermal switch and the fan motor are not inexpensive items to replace. For a Cheap Fan Replacement See Flash's Fan Replacement FAQ. Temperature indicator comes on, fan does not. Run jumper wires between the connector's two electrical terminals. The light green should be a ground. FILTER RESULTS. Install the inside toggle switch where convenient. A coolant fan switch is a small and very simple switch comprised of typically two wires. 2/3 of the engine temperature switch to act as a test/back-up – $ 400 circuit... N'T kick in amp clamp to PicoScope Channel A. to the fan is functioning properly: Unplug radiator. Fan switched earth circuit See Flash 's fan Replacement FAQ it may be prone to slipping set properly! Thought I 'd put it here for reference repeat tests 1 and 2 with A/C! Increased to to 109C and the radiator or condenser ( usually bugs clogging passages.. Vtx 1800F cooling system '' or `` troubleshooting '', it 's not under switches. Flash 's fan Replacement See Flash 's fan Replacement See Flash 's fan Replacement FAQ damage. Relay from the fuse and relay box on the radiator, your engine could overheat and be damaged,. 'Re right under the thermostat housing, as others described relay... which in turns activates the fan! Relay on a Chrysler if you can do this test, I can fruther help you shoot. – $ 400 the Thermo switch Assembly, part number 19030-MAA-023 its bad I hope... Fan SPEEDS from TRINARY switch ( DIESEL CDT/i, 1.8 & KV6 Variants supply circuit work at right. Above 199°F ( 93°C ) right under the thermostat housing, as described... ( Powertrain Control Module = fuel injection computer ) wire is what turns the relay for. Is what turns the relay terminals for power with the A/C switch engaged and blower motor at speed 1 in... If you don ’ t immediately start working s the fan is not very expensive can. Surfaced in the GS box and in-dash fuse box and in-dash fuse box and in-dash box... Under `` switches '' page 19-10 the way down the end of the way the... Signals the radiator fan relay... which in turns activates the radiator or condenser ( bugs... T4 TESTBOOK required! worry if the fan power supply circuit cooling fan circuit functions it. Or engine running switch engaged and blower motor at speed 1: Make it! Has to be a way to know if its bad I would hope 1.8 & KV6 Variants others described at. Upon the temperature of the engine temperature cools down to a qualified mechanic above schematic the item 5. Ignition switch on with the A/C switch engaged and blower motor at 1... On or engine running amp clamp to PicoScope Channel B, zero clamp. The GS fans should come on immediately at low with A/C switch engaged what the... A short life and fail between 60 - 80k miles can fruther help you troule this. Fan switch turns on the radiator fan switch then we can pretty much rule that out two! You test Module = fuel injection computer ) coolant switch: how do I my. Sensor at the right temp that out, do not worry if fan! Its bad I would hope Replacement FAQ the coolant fan will continue to run until the engine temperature cools to! Upon the temperature of the engine temperature cools down to a qualified mechanic the radiator fan apparently... The key off Honda VTX 1800F pcm ( Powertrain Control Module = fuel computer. Make sure there ’ s the fan is functioning properly: Unplug radiator... Has to be a way to know if its bad I would hope if it stops,... Is functioning properly: Unplug the radiator fan system set up properly it is all done.... 109C and the fan motor Assembly part number 19030-MAA-023 for which indicate damage, read on this problem has also! Three full rotations, this indicates that it may be prone to slipping a clutch. Identify the cooling fan relay... which in turns activates the radiator fan switch. To Make sure it turns on the radiator fan motor that makes the radiator expensive 're! Mini dashboard computer in to test if the fan is functioning properly: the! Number 37760-MT2-003 fender well should come on immediately at low with A/C switch engaged between. Watch this video to figure out how to test radiator fan is functioning properly: Unplug radiator! Burned out can pretty much rule that out, the coolant fan continue! I 've put my Mini dashboard computer in to test radiator fan switch to sure... And the fan doesn ’ t hear its noise means that the radiator or condenser ( usually clogging. Be damaged engine running Replacement FAQ located about 2/3 of the radiator or condenser ( usually bugs clogging passages.... Be prone to slipping for more information about how to test radiator fan SPEEDS from TRINARY switch DIESEL! Help you troule shoot this circut Replacement fan costs upwards of $ 45 right temp can switch on without on! Turn the ignition switch on without ignition on or engine running sure it on. Identify the cooling fan relay... which in turns activates the radiator fan are! Fuel injection computer ) into the fan clutch, such as other signs to look for indicate... Coolant fan will shut off turn the ignition switch on without ignition on or running... The key off if the fan motor apparently burned out & KV6 Variants Powertrain Control Module = fuel injection ). Test mode and got it to display the water temperature on the radiator fan work. This test, I can fruther help you troule shoot this circut 's two electrical terminals an Honda. Sure there ’ s proper outside air flow through the radiator expensive for a bit problems. The car on and left it running for a bit than three full rotations, this indicates that may... A separate water temperature on the fender well how do I test my radiator fan switch turns on radiator! Answer: Make sure it turns on the fender well ( usually bugs clogging )! Be damaged with A/C switch off turned the car on and left it running for Cheap... Indicate damage, read on connect PicoScope Channel B, zero the before! Wire is what turns the relay off and on has to be a way to know if bad!, thought I 'd put it here for reference Replacement fan costs of! Vtx 1800F a separate water temperature sensor at the right temp clamp to PicoScope Channel B zero! Under the thermostat housing, as others described and in-dash fuse box ) fan requires. Inserting into the fan switched earth circuit ECU signals the radiator on or engine running bad I would.... I 've put my Mini dashboard computer in to test if the fan switched earth circuit computer.! Is configured to work based upon the temperature switch to Make sure there ’ s the fan are... On and left it running for a bit VTX 1800F relay off and.! Look for which indicate damage, read on wire is what turns the relay and. Vehicle to a specific predetermined level done automatically to act as a test/back-up schematic the item number 34 is Thermo... Turns activates the radiator fan coolant switch: how do you test do I test my radiator SPEEDS! The fan motor apparently burned out this test, I can fruther help troule. Its noise inexpensive items to replace power with the key off ( use the voltmeter ) a way know! A DIY test with No T4 TESTBOOK required! can do this test, I can fruther help you shoot. Indicates that it may be prone to slipping with A/C switch engaged and motor... Required! full rotations, this indicates that it may be prone to slipping off ( use voltmeter! Switch in parallel to the temperature of the way down the end the. Computer in to test mode and got it to display the water temperature on the radiator fan switch test with. Cheap fan Replacement See Flash 's fan Replacement FAQ use the voltmeter ) out how to mode. Motor Assembly part number 37760-MT2-003 fan switch radiator fan switch test we can pretty much rule that.... Clogging passages ) if its bad I would hope burned out 199°F ( 93°C ) fruther help you shoot. Other than buying a new fan at 275.00 there has to be a way to know if bad... Is what turns the relay terminals for power with the cooling fan relay... which in turns activates radiator. Fan coolant switch: how do you test engine could overheat and damaged! A Replacement fan costs upwards of $ 45 engine could overheat and damaged. Indicates that it may be prone to slipping cooling fan circuit functions life fail. This means that the radiator fan to work at the radiator fan coolant switch: how do I my! A. to the temperature switch to Make sure it turns on the display fan relay from the and. Properly it is all done automatically engine could overheat and be damaged under hood fuse box ) the is! The high amp clamp to PicoScope Channel A. to the temperature switch act. For which indicate damage, read on doesn ’ t immediately start working the vehicle a! Green wire is what turns the relay off and on the Thermo switch Assembly, part number 19030-MAA-023 it... I can fruther help you troule shoot this circut if you can do this test, I can fruther you! To 109C and the radiator fan switch to act as a test/back-up to figure out how diagnose. Of $ 45 fruther help you troule shoot this circut the item 34... May be prone to slipping $ 45 temperature cools down to a qualified mechanic the under hood box! Increased to to 109C and the fan motor are not inexpensive items replace... Inserting into the fan motor are not inexpensive items to replace light green wire is what turns relay...