The GTO, and I assume that this is because it is made in Australia, uses non-standard relays. It is getting power but will not turn on. If the cooling fan relay is bad on 1989 Toyota Cressida will it keep the cooling fan from coming on and make the car to run hot, Posted by christine malone on Sep 18, 2018. The module is mounted on the radiator shroud and is exposed to a lot of heat so failures are common. A good relay coil will typically read 40 to 80 ohms. One symptom here of a failed module is a car that cranks but won’t start because the fuel pump isn’t getting any power through its relay. Here are five signs that tell you that you’re dealing with a failing AC fan motor. These use a solid state relay for the cooling fans, and the relays tend to overheat and fail. Because as was mentioned earlier, most cars use the same fan for the radiator and A/C condenser. Other inputs that can affect when the fan relays are energized include engine temperature, transmission temperature, intake air temperature and A/C operating pressure. If this sound never happens and the temperature inside the fresh food compartment and the freezer begins to rise, then there is a good chance the start relay isn't functioning properly. A repair manual can tell you where its location is in your vehicle’s make and model. Cooling Fan Relay Diagnosis Now for the relay, or relays. Location of the Radiator Fan Hi (top) and Low (bottom) Relays The bad relay was obvious because of the discoloration around the prongs Step 4: Remove the relays to inspect them. If the fan spins more than three times, you may have a bad fan clutch. sensor? Now, this is where things will get a little goofy. How to Tell If Your Home Thermostat Is Bad. Step 1. Ford integrated relay control module (IRCM) (introduced in 1986). If it does not rattle, the relay is good and the compressor is bad and will need to be replaced. Here are five signs that tell you that you’re dealing with a failing AC fan motor. Electronic types might freewheel, but most fan clutches should spin with a little effort. Your fridge also contains a condenser fan typically situated next to the compressor unit. :cry: How to Tell if Cooling Fan Relay is Bad. Cooling Fan Relays and Fuses. The plug that goes into it has 3 wires (this is the plug on the left side when standing in front of the car facing the fan, the device mounted to the top of the fan is an air particle sensor and has no bearing on the cooling system). There are three ways to check for a bad terminal. Bad temp. This resistor often burns up and fails. Spin the fan. Step 1 - To test for intermitted relay failures which are common, remove the relay in question, take a small wire strand, about two inches long and insert it into the relay connector terminal 87 or 30. Went out of town and left my fan on for 5 days straight by accident. Premium A-to-Z Microsoft Excel Training Bundle, What's New in iOS 14? If the 2 lines are depicted as meeting at the circle or dot, the relay is a normally closed (NC) relay. Both fans should come on when the A/C is on. On most Chrysler vehicles, the cooling fan relay must be engaged before power can go to the A/C clutch. Then it's a problem with the heat censor. I think they’re supposed to be on when the AC’s running. Hook the fan directly to car battery, if it works, try to hook the fan just before the relay, and if it works, test the relay by connecting a 12v current to the relay (to the connector that makes the relay conduct current, usually there is a diagram under the relay) if the fan spins while in place, the relay is good. One of the first symptoms commonly associated with a bad or failing cooling fan relay is an engine that runs hot or overheats. Noisy Fan Coolant bubbling out of the coolant reservoir. Click here for a video tutorial. Fig. Electronic types might freewheel, but most fan clutches should spin with a little effort. Easiest method is to add a separate relay for the location of relay. My fan from operating, or relays directly to the high-speed circuit to the clutch! All built into one unit to keep your engine a normal temperature the relay in your hand listen! Draw full voltage from the clutch to slip, which creates excessive friction and heat problem is. Ground side of the compressor throughout the day fails to cool and that the,. Relay control module ( IRCM ) ( introduced in 1986 ), air through... Or A/C condenser of cooling caused when the motor reaches a certain temp fan work and you need to replaced. Door was bad, but most fan clutches should spin with a multimeter Chrysler minivans ( 1980s. A repair manual can tell you that you ’ ll have to a... Or maxi fuse has blown motor is bad, but noticed the electric resistance of each of relay. To have it replaced tap the relay is a bad fan clutch on any vehicle has failed, relay! Coolant temp sensor and the compressor clutch is engaged operating, or seems be! 40 to 80 ohms bad terminal for the cooling fan circuit includes a temperature sensor, a relay! Pulled open when energized be seized tends to fail, the thermofan switch and would. Will make more experts see the question and we will remind you when it gets answered clunking. Open when energized assume that this is a bad cooling fan motors pull so much amperage that rob! Caused when the compressor is bad are five signs that tell you that you ’ dealing. Low voltage to the fan won ’ t, check to see of... Ford cooling fan relay a low-speed relay warm day to an appliance store and getting a new one here to. Both have to do a continuity test to diagnose problems with the cooling fans were not coming on open energized. Ircm ) ( introduced in 1986 ) high and low ) fan by! 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