Before everyone jumps on my case and tells me to do a search, I have searched quite a bit and tried many of the suggestions.
The truck is a 98 Pete 379 with an N14 Cummins. I bought the truck used and it has always had the engine fan light on in the dash and as soon as the truck has enough air the engine fan stays on at ALL TIMES.
I have replaced the fan clutch solenoid, done the paper clip truck on the ac switch, etc. I am at a point that I’m not sure where to look next. The clutch is not froze up because when I disconnect the ground for my fan clutch solenoid the fan actually disengages. So what am I missing? What could be telling the solenoid to continue running at all times?
Any help appreciated.
Cooling fan issues
Discussion in 'Peterbilt Forum' started by Mustangjoey, Apr 2, 2019.
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Ask yourself "What's hot" where is that solenoid to go "Ouch" and switch fan on?
Mustangjoey Thanks this. -
Not sure I follow. Faulty switch? I assume when the light in the dash is on, that’s because the fan switch is on. But I’m not an expert.
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St00pid question, but do you have a bunk override switch on the dash? Is it active? If so, is the bunk AC on? My wife has a habit of accidentally hitting the heat/cool switch and I always know because the engine fan will come on.
x1Heavy and Mustangjoey Thank this. -
x1Heavy and HoneyBadger67 Thank this.
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Did you check the fuse? It is in fuse panel by clutch pedal. Don't think it is labeled very well.
Dino soar, Mustangjoey and x1Heavy Thank this. -
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It might be missing!
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I had the same thing happen on my 379 it’s a 2000 with a 2WS.
I had to replace the wiring harness that goes from the ECM all the way to the front of the motor cured it.
took me months to find it drove me crazy !!!
Hope this helpsMustangjoey Thanks this. -
I"m having a similar issue with a 2019 T680. Going to KW tomorrow. I'm told that my most likely issue is the sensor located in the bottom of the coolant reservior. I realize its a different age and engine..just sharing.
Mustangjoey Thanks this.
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