The engine fan of my International 9400 comes on and shuts off frequently while driving. I checked the engine's temperature and it's normal. Any suggestions on what could be the problem?
Normally, the engine fan should not turn on until the engine gets to 216 to 220 degrees Fahrenheit. However, if it comes on even when your International 9400 truck's engine is at a normal temperature, then you might have issues with the air conditioning. If the pressure of your vehicle's air conditioning reaches 350 psi, the engine fan will definitely turn on. You need to find the cause of this pressure spike in order to fix the problem. Usually, it's caused by a faulty expansion valve or a condenser that is not pulling enough air through it. It is also possible that your vehicle is intermittently losing power or ground to the fan solenoid. Test it out using a multimeter and place it on different points of the power connector to make sure that there's power running through the cable.
I have an International 9400 with an auto shift feature, and at times the shift gets hung up when switching from 6th to 7thgear. What could be causing this?
There are some problems that can cause the auto shift to act like this. First, make sure that your truck's coolant is at the recommended level. Next, look for the fuse for the engine control module (ECM) and the other should be for the transmission. Pull both of them out and back in after 10 minutes to reset the truck's computer. If this doesn't fix the auto shift, look for the sensors in the top plate of the transmission and on the tail shaft and replace them with new ones. Do not jump the gun and replace the entire system—you might end up taking out more money than necessary on what could have been a simple problem.
My International 9400 truck has daytime running lights that are supposed to light up only when both the key is on and the parking brake is released. Lately, I noticed that it stopped working. Any suggestions on how I can fix this?
In order to fix this, you first need to check what's causing the problem. First, the lights' electrical connector might be loose. With your truck's engine off, locate the daytime running lights assembly. Remove it and gently tug on the electrical connector at the rear. If it comes out easily or feels loose, secure it as tight as possible, tugging it once more to test if it's plugged in. Then, reinstall the assembly and test if the lights start working. If that doesn't help, remove the bulb and replace it with a new one. Should the lights still not come on, the fuse may have been blown out. You can find the fuse in the fuse box in the engine compartment. Remove the cover from the fuse box and locate the one labeled "DRL" or "Daytime Running Lamp." If this still doesn't work, you might have to replace the entire daytime running light s assembly.