How To Fix A Non Working Cooling Fan On A Jeep Wrangler ођ Step 1 – clean any debris. before beginning diagnosis for a faulty cooling fan, ensure the fan and radiator are free of excessive dirt, mud, or debris. many jk owners regularly take their wrangler off road and often drive through some rugged terrain. unfortunately, while the wrangler can traverse heavy mud, deep water, and sandy dusty trails. Check the cooling fan fuse in the totally integrated power module (tipm) located under the hood. by removing the fuse, you can easily inspect if it is blown. if the fan was locked up for only a short period of time, replacing a blown fan fuse will typically restore functionality. a jk that keeps blowing the fan fuse is often a sign of a damaged.
2008 Jeep Wrangler Cooling Fan Not Working The high speed circuit bypasses the actual resistor, sending the full 12v to the fan for high speed. the ceramic resistor has three terminals (high low ground) on the input side and two wires (positive ground) on the fan side. relays may be tested in any normal fashion you are familiar with. If you are having where your fan will not stop running after the key is out or over heating problems and have checked the fuse box fan relay, and fuses,and p. Possibly get someone to check out the assembly line if this is a common problem. if anyone having an issue with overheating, or radiator fan not working, i hope this post helps you. check the bolt. tl;dr: radiator fan wasn't working. the nut on the fuse box for the radiator fan fuse like cable was loose, it wasn't getting contact. A c compressor head pressure controls the fan to turn on. if you have the a c turned on, then also turn on the re circulate, which should turn on the fan, regardless of out outside temps. or turn on your heater, and set it to defrost windshield mode. this will also turn on the engine cooling fan.
2008 Jeep Wrangler Cooling Fan Not Working Possibly get someone to check out the assembly line if this is a common problem. if anyone having an issue with overheating, or radiator fan not working, i hope this post helps you. check the bolt. tl;dr: radiator fan wasn't working. the nut on the fuse box for the radiator fan fuse like cable was loose, it wasn't getting contact. A c compressor head pressure controls the fan to turn on. if you have the a c turned on, then also turn on the re circulate, which should turn on the fan, regardless of out outside temps. or turn on your heater, and set it to defrost windshield mode. this will also turn on the engine cooling fan. Normally when the fan comes on after a few seconds minutes of starting. there is either air in the coolant lines, or a stuck thermostat. there is a bleeder valve on the top of the thermostat. you may have to remove the air intake to get at it, then use a screw driver to turn the bleeder valve to release the air until the cooler starts spitting out. If your wrangler has a bad engine temp sensor the radiator fan won’t know to come on, because the ecu won’t know how hot the engine is. you’ll need to locate and test the engine temp sensor. depending on the model year and engine, the location varies. if it does end up being this sensor, they are very affordable.
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