I tried to disconnect the fuses with the same result. First is if you have 2 keys already programmed and that operate the vehicle. A 12v car battery in excellent condition has a capacity of 48 amp-hours. The anti-theft light is located at the For the light to blink, the anti-theft system draws as little as 2mAmps. Then diagnose the anti-theft system before you start replacing FORD MUSTANG ANTI THEFT PATS TRANSCEIVER. To deactivate the immobilizer system: Insert the ignition key into the key cylinder and turn it to the ON position. The audible grinding noise is the metal hub trying to engage the front driveshaft, hence the metallic grating noise.Anti theft light not blinking. If the IWE fails completely the 4WD system defaults to 4H even with the interior selector set on 2H. If there is a leak or only partial vacuum pressure loss, the Hub won’t fully engage.
Once there is a leak the pressure is lost and the hub will “dislocate” and attempt to engage 4H. There is a service bulletin regarding the replacement of a faulty IWE Service Bulletin which you can read here:įord F150 IWE Grinding Service Bulletin Replacement Guideīasically, The IWE requires constant vacuum pressure to keep the drivetrain in 2wd mode. The problem again is more than likely the IWE. In the case of the automatic transmission, the truck might refuse to shift up to a higher gear and will require you to manually shift up. If you let off the gas or accelerate, it won’t make much of a difference with regard to the grinding noise. The problem happens randomly and for longer periods each time. Fortunately, it’s a cheap and easy problem to diagnose and repair. The problem can occur without any prior warning signs. If you are experiencing a problem with a grinding noise coming from the front of your vehicle while accelerating then this section is for you. This will require you to remove the front wheels and investigate a bit further. If there is a strong vacuum and the driveshafts are still rotating, there is possibly a problem on the wheel end with the actuator that engages the hub. Only once 4WD is engaged, should the CV and front drive-shafts rotate. The front driveshaft should not rotate when you turn the tire. So, to further diagnose, remember when the truck is in 2WD mode there should be a vacuum on the bigger hose down below. Replace the new design with the hood to prevent moisture damage from reoccurring.
Older style solenoids had no cover/hood to prevent moisture from getting in. In many cases, moisture is the cause of the solenoid failing. That will determine if the solenoid is actually working without any fancy electrical equipment. There should be no vacuum on the top pipe. Next, with the car in Park, engage 4WD and test for vacuum. Next, start up the truck in 2WD and test for vacuum pressure from the top pipe.
Installing dark mode switch on 2012 f150 free#
To test, jack the front of the truck up and test if both front wheels are free spinning.īefore you run any tests make sure the bottom vacuum lines are connected back up. That would provide a permanent vacuum when the engine is switched on and sucks the diaphragm from the IWE back in, allowing the front wheels to rotate freely. To test for vacuum, you remove the hose from the check-valve connection and stick it in the second hose that feeds pressure to the IWE’s. The second hose should only have vacuum pressure once 4WD is engaged. The one line (check valve) should have a constant vacuum when the engine is running. There are 2x vacuum hoses held together with a black plastic housing.
So to test for vacuum, you need to remove the vacuum hoses from the solenoid which is located against the firewall. You won’t even need a vacuum gauge to accomplish this or any fancy testing equipment. What you want to accomplish is, test the vacuum line for pressure. It is usually situated on the passenger side of the truck next to the battery. The first thing you want to do is locate the solenoid. The purpose of this test is to make sure you have vacuum pressure and the hoses are void of any leaks and cracks. Your first point of trouble-shooting should be to locate the vacuum system. So what’s the first component we need to find? You just need to understand how the 4WD system works and where to look. The nice thing about diagnosing the F150 is that you won’t need any high-tech equipment and specialized tools to diagnose the problem.
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