How do you diagnose a four-wheel drive problem?

Common 4WD problem symptoms:

1. decreased traction in snow or mud.
2. rattling noise when 4WD engaged.
3. “Service 4WD” indicator light is on.
4. can’t disengage 4WD (4WD light on).
5. excessive front tire wear (4WD won’t disengage)
6. excessive fuel consumption (4WD won’t disengage)
7. lack of power (4WD won’t disengage)

What are the symptoms of a bad transfer case switch?

Here are some of the most common signs you may encounter when you have a bad transfer case:

• Gear Shifting Issues.
• Difficulty Staying in 4WD.
• 4WD Will Not Engage/Disengage.
• Puddle Formation Directly Under the Transfer Case’s Location.
• Weird Grinding, Growling or Humming Noises.
• 4WD Warning Light Illuminates.
• 4WD Transfer Case.

How does Ford f150 electronic locking differential work?

The electronic locking differential on Ford F-150 is a device housed in the rear axle, and when activated, allows both wheels on a specific axle to turn at the same speed. You can activate the differential electronically and shift it on the fly within the operating speed range which is 20 mph (30 km/h).

What is a 4WD transfer case position sensor switch?

The transfer case is what sets 4WD vehicles from 2WD. It consists of several parts which work together to deliver engine power to the front and/or rear differentials. One of its important parts is the 4WD transfer case position sensor switch and when this part fails to work you will have a problem transferring shift in your 4WD.

How do you test a 4WD switch with a multimeter?

Next, test the 4WD switch to make sure it’s functioning properly. You’ll need a multimeter. You can see where I used the ground wire on the cigarette lighter / 12 volt jack for the multimeter ground. Next, I placed the meters probe in to the second pin slot as shown in the photo below.

How many fuses control the 4WD?

There are (2) fuses that control the 4WD. One in the passenger compartment, and (1) under the hood. Check the # 5 (4×4 control module) 15 amp fuse in the passenger compartment. Also check the #13 (4×4 Motor) 20 amp fuse under the hood.

Can a bad transfer case switch cause service 4WD?

A damaged transfer case switch might cause the service 4wd message in your dashboard to illuminate, but if it’s difficult to get the transmission to shift to 4wd then it is necessary for you to have your transfer case and its switch inspected and changed if needed. Replacing a transfer case switch is moderately difficult.