What does no power to fan solenoid mean?
Just had my cummins isx inframed with a new head and brought it home notice the fan would not disengage.unhooked air line to fan clutch it moved in and out checked for power to solenoid and no power with key on could not find any broken wires now stumped anyone with any ideas. Every month 400 people find a job with the help of TruckersReport.
Why is my ISX cooling fan not shutting off?
Actually the ECM turns off power to the solenoid to lock the fan on. All you need is bad connection or wire in that circuit to cause this, or a faulty solenoid. The A/C high pressure switch and fan override switch are separate inputs to the ECM and could also be acting up. The fan clutch itself may be getting stuck, or have a bad air leak.
Why is my truck cooling fan not turning off?
The fan clutch itself may be getting stuck, or have a bad air leak. With the a/c and defroster turned off, run the engine at idle. The fan should off once the engine has been running for a minute or two.
Do you need a solenoid valve for a fan clutch?
Freon Pressure Switch, and N.C. Solenoid Valve are the only controls absolutely necessary for Fan Clutch operation. The N.C. Manual Switch, Air Pressure Switch, and Indicator Light are all optional controls and may be left out of the circuit.
How does a fan solenoid work in a clutch?
Most fan solenoids are controlled by ECM ground. They are inline with the ECM that turns on a transistor to complete the circuit to ground. Because they are designed as failsafe, the ground circuit is completed when the fan is not needed. Meaning, the solenoid is grounded, allowing air flow to the clutch to keep the fan off.
What does it mean when the solenoid fails on a truck?
Meaning, the solenoid is grounded, allowing air flow to the clutch to keep the fan off. If the fan solenoid fails or there is low air pressure, the fan will stay on.
What does it mean when your fan clutch won’t stop?
It’s air operated, turns off when air is introduced and shuts off when it doesn’t. Most of the time 85% it’s on meaning it has no air in line to fan. BMT Certified Know-It-All! I have a 1999 Mack Ch613 and my fan clutch won’t stop. Fan clutch it’s self is fairly new but I’m pretty sure that’s not the problem. I suspect it’s something electrical.
When do you turn on the fan relay?
When the correct parameters are met, a temperature switch or the computer will activate the relay, which will allow power to the fans. The relay will usually be activated once it is detected that the vehicle’s temperature approaches excessively high temperatures.
What are the symptoms of a bad cooling fan relay?
1. Engine running hot One of the first symptoms commonly associated with a bad or failing cooling fan relay is an engine that runs hot or overheats. If you notice that your engine is running at higher temperatures than normal, that may be a sign that the relay is not functioning properly.
What to do when your car speedometer is not working?
If no change is seen after you have made dip switch changes, verify that power was off when the changes were made. Check the voltage to the speedometer with a meter. If you don’t have a meter, disconnect the power wire from speedometer or positive wire from the battery to make absolutely sure the power is off.
https://www.youtube.com/watch?v=JHh5idP8QP8
Where is fan control solenoid on Peterbilt 379?
If nothing can be seen with the service tool, you most likely have a faulty fan control solenoid, fan hub, or broken fan control wire that runs from the engine ECM. It is on pin 11. Basically, the ECM sends out 12 volts on pin 11 whenever the ECM wants the fan off.
What is the fuel solenoid number on a Cummins Engine?
You are buying a Genuine Cummins Fuel Solenoid 4024808 for all L10, M11 & N14 Electronic Engi.. You are buying a brand new part number 4326596 replaces 2872362 OEM Cummins (E.. $49.95