I have a 98 pete with a 3406e cat.
Fan clutch stays on all the time from the time the truck builds up enough air for it to run.
I checked the manual switch on the dashboard and disconnected the wires. Both wires have constant power as long as the ignition is "on"
Checked switch on firewall, also recieving constant power.
Anyone else run into this issue? Killing me on fuel not to mention that the truck wont reach its normal temperature.
98 pete fan clutch issues
Discussion in 'Peterbilt Forum' started by flaco, Mar 1, 2015.
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check for air leaks in air hose running to fan clutch,
flaco Thanks this. -
air leak would be my guess also ,i would start looking around the fan clutch lots of luck
flaco Thanks this. -
I had a 98 Pete with a Detroit that had a similar issue. Turned out to be a chafed fuel temp sensor wire in the engine harness that shorted to the block. ECU activated the engine fan because it sensed high fuel temp.
flaco Thanks this. -
Thanks guys, no air leaks so gonna check wiring now.
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flaco Thanks this.
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Okay bad-luck. Gonna check the solenoid. Fan turns freely when truck is off. Bypassed the hose with another one just to check...no leaks.
But there is continous power to the solenoid as long as the ignition is on. Dont know if thats normal? -
flaco Thanks this.
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Yup. Disconnected power to the solenoid and the fan stopped.
However, the "engine fan" light on the dash stays on. -
flaco Thanks this.
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