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.
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. On hot days (temps in 90's plus), my jeep would overheat while driving regardless of speed. higher speeds didn't help cool it off. in older vehicles that had questionable cooling fans, you could just drive 50 60 and the airflow through radiator was enough to keep your engine happy. not so in the jk. particularly if you're running the a c. 4x4campingcorpsfollow along as i finally get to fix the radiator fan motor on my jk which we discovered had a bad connector. i ended up using all mopar parts. The 2012 and up jeep jk wrangler fan on the 3.6l pentastar has a few key characteristics: it is an outrunner motor design. this doesn’t have much bearing on diagnosing problems, but it’s a key difference from the more traditional fan designs in the earlier jeep jks. the fan is a 3 wire design, which you can see if you detach the harness.
4x4campingcorpsfollow along as i finally get to fix the radiator fan motor on my jk which we discovered had a bad connector. i ended up using all mopar parts. The 2012 and up jeep jk wrangler fan on the 3.6l pentastar has a few key characteristics: it is an outrunner motor design. this doesn’t have much bearing on diagnosing problems, but it’s a key difference from the more traditional fan designs in the earlier jeep jks. the fan is a 3 wire design, which you can see if you detach the harness. Rsmwrangler. 5594 posts · joined 2015. #8 · jan 24, 2022. the fan is programmed to turn on when the coolant temp>221f and ambient temp <105f, if ambient temp >105f then coolant temp will have the fan turn on when coolant temp > 217f. if you monitor the action, the fan turns on when the coolant is 5f higher than the set temp so that means it. Also perfectly normal. if you're not moving, the air and the heat aren't moving either. you're sitting there with the engine belching out heat, which warms the surrounding air and pavement, and then the fan dutifully blows that warmed air across the radiator and engine to cool it, while the engine also continues to sit above the pavement that's radiating its own heat back at it.
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