Use manufacturer data to identify the cooling fan circuit functions. Both the thermal switch and the fan motor are not inexpensive items to replace. The light green wire is what turns the relay off and on. For more information about how to test a fan clutch, such as other signs to look for which indicate damage, read on. If the fan clutch requires repair, take the vehicle to a qualified mechanic. Fuses (both in the under hood fuse box and in-dash fuse box). Mark this terminal on … CRP/Rein (2) Duralast (177) Facet (34) Santech (8) URO (7) Valucraft (2) Show less. There will be one terminal that has power with the key off. If the fan starts to spin, the motor is good. Here is how to test if the fan is functioning properly: Unplug the radiator fan connector. Turn the ignition switch on with the a/c switch off. Minimize the help page. Turned the car on and left it running for a bit. See Contact Test in Step 1. Use Code: DIYSAVE10 Online Ship-to-Home Orders Only. How do I test my radiator fan switch to make sure it turns on at the right temp? The coolant fan will continue to run until the engine temperature cools down to a specific predetermined level. This problem has apparently also surfaced in the GS. I now have a rocker switch in parallel to the temperature switch to act as a test/back-up. Watch this video to figure out how to diagnose problems with the cooling fan relay on a Chrysler. Filter. 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. 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 … Now repeat tests 1 and 2 with the A/C switch engaged and blower motor at speed 1. Temperature indicator comes on, fan does not. Run jumper wires between the connector's two electrical terminals. Radiator Fan Coolant Switch: How do you test? The radiator fan switch closes above 199°F (93°C). Here’s how to tell if your cooling fan isn’t working, what you should do about it and what the problem might be. So, do not worry if the fan doesn’t immediately start working. If so, a replacement fan costs upwards of $45. [If you can't find the fan circuit test lead near the ECU, you may not have the coolant recall fan modifications.] Older Volvos had a separate water temperature sensor at the radiator. The old 4 wire motors have quite a short life and fail between 60 - 80k miles. 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. Other than buying a new fan at 275.00 there has to be a way to know if its bad I would hope. Switch must be bad. Never re-use a grommet, but renew each time the switch is … Thank you for the reply! Radiator fan switch. Once you get the radiator fan system set up properly it is all done automatically. Radiator fan motor relay. PCM (Powertrain Control Module = fuel injection computer). 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. Connect the high amp clamp to PicoScope Channel B, zero the clamp before inserting into the fan power supply 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. Any Ideas what could be causing this? It's not under "cooling system" or "troubleshooting", it's under "switches" page 19-10. Etc. When cool air is produced in the car’s A/C system , the cooling fan module blows it into the car maintaining a fresh supply of … 10% OFF $75. 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. Items per Page. You'll then hear medium for test 1 and high speed for test … 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. For a Cheap Fan Replacement See Flash's Fan Replacement FAQ. The light green should be a ground. ( 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.) What you need to do now is pull out a voltmeter and test the voltages at the wires coming into the cooling fan … I've put my Mini dashboard computer in to test mode and got it to display the water temperature on the display. The cooling fan can switch on without ignition on or engine running. 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 … General E46 Forum 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. A radiator fan is not very expensive and can cost around $200 – $400. If it spins more than three full rotations, this indicates that it may be prone to slipping. 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. Turns out my fan motor is fine. These do not. If anyone else needs to know, you just unplug the connector from the switch/sensor on the bottom of the radiator and use … The radiator fan itself may be faulty. Once the temperature reaches this cooling stage, the coolant fan will shut off. A coolant fan switch is a small and very simple switch comprised of typically two wires. Things to look for #2. In the above schematic the item number 5 is the Fan Motor Assembly part number 19030-MAA-023. If you have a new fan switch then we can pretty much rule that out. Battery out including the box, intercooler pipe off, map sensor disconnected, wiring moved and a deep 30mm socket from Halfords to loosen the switch. This is a DIY test with No T4 TESTBOOK required !! It’s the fan motor that makes the radiator expensive. edit- the bike is an 05 Honda VTX 1800F. The temp increased to to 109C and the radiator fan didn't kick in. Then test the fan clutch by giving it a good push. This is a test. Bill. Answer: Make sure there’s proper outside air flow through the radiator or condenser (usually bugs clogging passages). 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. Test the relay terminals for power with the ignition key off (use the voltmeter). 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. 2007 Brute Force 750. Item number 34 is the Thermo Switch Assembly, part number 37760-MT2-003. If the relay is working, the fan should be operating. I am having the same problem. This switch is configured to work based upon the temperature of the engine. Cooling Fan Switch - Radiator. 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. 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. Although the coolant fan switch is very small and sometimes over-looked, it is an incredibly important component to your car’s cooling … This means that the radiator fan switch turns on the radiator fan relay... which in turns activates the radiator fan motor. Your car’s cooling fan, or radiator fan, plays an important job in keeping your engine cool. Radiator Fan Cost. The ECU signals the radiator fan to work at the precise time. Fans should come on immediately at low with A/C switch engaged. Check the online microfiche for part numbers. Fig. I just replaced my fan switch with the Neuspeed 3 pole switch that brings the fans on at 80 degrees. Check that the cooling fan stops. 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 . 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. BRAND. The switch is located about 2/3 of the way down the end of the radiator. 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. 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. 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. Install the inside toggle switch where convenient. Visually check the fan if you don’t hear its noise. Remove the radiator fan relay from the fuse and relay box on the fender well. Step 3 – Test the radiator fan. Cooling Fan Switch - Radiator. Check also the Thermistor is working. 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. 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. HOW TO TEST RADIATOR FAN SPEEDS FROM TRINARY SWITCH (DIESEL CDT/i, 1.8 & KV6 Variants. Connect PicoScope Channel A. to the fan switched earth circuit. It was a git of a job. Ugh. After several requests from members, thought I'd put it here for reference. If you can do this test, I can fruther help you troule shoot this circut. Problem: '97 F650 Radiator Fan Motor apparently burned out. FILTER RESULTS. Electric radiator-fan motors are switched on either by the ignition switch - and run while the engine is working - or by a thermostatic switch. 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