Why does my Peterbilt fan not go off?
I have a 2004 peterbilt with a c-15 engine. When the outside I have a 2004 peterbilt with a c-15 engine. When the outside temperature goes below a certain temperature like -15 celsius the engine fan engages and won’t go off. What would cause this to happen? … read more
Where is the AC switch on a Peterbilt?
The reason I ask is because the AC switch and the manual fan switch can be wired in series on the wire from pin 11. Or they can be wired directly to the engine ECM and report independent of the wire 11. If you have a service tool you can go into configuration screen and see the programming.
What kind of Engine Fan comes on and off at highway speed?
Have a 3406e in my 2000 model 379 and my engine fan comes on and off at highway speed. It’s not running hot. I’ve replaced the fan sensor on … read more
Is there a problem with my Cat fan?
A few weeks ago I had a problem with my 97 Volvo 3406E; the fan would not come on. So I put in a switch to turn it on when needed. Now i have this 2002 International with the opposite problem.
How often does the engine fan stay on?
Discussion in ‘ Trucks [ Eighteen Wheelers ] ‘ started by tkilby, Jun 23, 2010 . 05’ Pete 379 with a Cat ACERT: The last few day’s the engine fan has been staying on 90 % of the time. The air solenoid on the firewall has no power and the manual rocker swich has power only on one side “the yellow/orange wire”.
Why does my engine fan keep coming on when the a / C is off?
You could have a bad high press switch on the A/C. Thats the swtich that will turn the fan on when the A/C is on and say your not moving to get air flow. Unplug the swtich and put a jumper wire on it and if the fan stops you found your porblem. They can go bad and make the fan stay on even with the A/C off.
How do you turn off an engine fan?
There are two high pressure switches, one to cut out the compressor and the other to signal the ECM to turn on the fan. Open circuit to the ECM means high pressure, once you jump it to trigger low pressure, (assuming the pressure is faulty), the ECM will count down about 2 to 3 minutes before it will actually turn off the fan.
What’s the problem with my Cat cooling fan?
A few weeks ago I had a problem with my 97 Volvo 3406E; the fan would not come on. So I put in a switch to turn it on when needed. Now i have this 2002 International with the opposite problem. The fan cycles off and on about every 3 minutes. 3 on; 3 off. It does this all the time. Weather idling, road speeds, or A/C on or off.
How often does the cat cooling fan cycle?
The fan cycles off and on about every 3 minutes. 3 on; 3 off. It does this all the time. Weather idling, road speeds, or A/C on or off. Engine temp never goes above 190*. Anyone have any ideas what is causing this?