did some digging and he owns a 97 freightliner with detroit 60
In my my case when i had this issue, it turned out the ecm was bad but that was on cat motor.
Engine Fan Wont Turn Off
Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Turbrospeed, Oct 26, 2021.
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Hey guys i forgot to update on what i did.
I ended up putting a switch to control the fan manually from the ground output wire. I wasnt going to pay hundreds of dollers to a shop to fix the problem and have my truck there sitting for who knows how long. If i do turn on the ac while stopped, i just flip the switch n done. -
It is probably either a failure your High Pressure sensor on the Air Conditioner, or a failure of the wire connecting it to the computer. Lots of times the ground fails somewhere in the harness.
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Isn’t it still going to be coming on when it’s doesn’t need to ?
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