How to bench test transfer case motorHow to bench test transfer case motor

Last updated on March 23rd, 2022 at 03:05 am

Recently, due to fuel leaking, performance problems, and growling, or grinding noise in my cousin’s car, he is at his wits’ end! That’s why he has made up his mind to change it. A mechanical engineer or car owner faces many problems with a car like this. 

Humming and growling noise is problematic enough to make anyone annoyed and anxious. Have you experienced the same problems with your adorable car? Whatever, these problems are symptoms of a bad transfer case encoder motor. So, let’s dive into the question, “How to bench test transfer case motor?”

The important task will be to test the transfer case motor of the car through a bench test. No need to worry about transfer case motor and transfer case encoder motor. Because the main job of both is to generate energy. You know, they are friends like us!

Transfer case motor 

Mostly use of a transfer case motor in heavy vehicles, buses, trucks, rock-crawling vehicles and some types of military vehicles are mainly four-wheel and all-wheel drive. It’s just not known as a transfer gear case, transfer box, transfer gearbox, or jockey box.

The transfer case motor acts as part of the driving force of four-wheel-drive, all-wheel-drive, and other powerful wheels. It carries the energy generated from transmission through the drive shafts to the front and rear axles.

It seems difficult, isn’t it?

To know more about transfer case motor-related topics, such as how to align transfer case motor, how to reset transfer case control module and how to program transfer case control module, and so on you are reading this article. has published the article to make your task easier. Like, a transfer case motor is providing power to the wheels of your car.

Another one, what is a transfer case encoder motor and is easy to use.

In the circumstance of transfer case encoder motors, the drive of some off-road four-wheel vehicles can be turned on or off based on the driving condition. Depending on the types of cars for this change, there may be shifters or electronic switches.

Normally, the transfer case encoder motor is easy to use because of such a twisting nature and is quite convenient for everyone.

Where is the transfer case control module located?

You don’t have to cross the Amazon jungle to find a transfer case encoder motor position sensor. Because at the bottom of the driver’s side dashboard on the steering column you will find the location of the transfer case control module.

Are you confused about how to bench test transfer case motors?

Well, you’ve come to the right place. We will lead the way Ins and outs on how to bench test transfer case motors and work out on this issue.

Tools for Bench test

You need some simple tools to start testing, for verifying the correctness or soundness of a motor design or model. Test bench or testing workbench that uses an environment where you can get the equipment you need.

With the help of oscilloscopes, multimeters, soldering irons, wire cutters, and so on, as an engineer sitting at the lab bench, you can measure and manipulate the correctness of the device under bench test.

This guide is valid for transfer case testing of any model.

Simple tips to remove the transfer case shift motor: 

  • Keep your car high with the help of Jack stands.
  • Slide to the bottom of the car and find the location of the transfer case motor.  
  • Unplug from all sorts of bindings.
  • Bring out the machine.
  • Remove the transfer case motor and place it on the table for testing.

Transfer case motor with a fluid leak

If the seal goes bad between the transfer case and the transmission, it will be a major cause of an internal or external transmission fluid leak.

So, to eliminate the fluid leak problem of the transfer case, the part of the seal between the transfer case and the transmission should be examined. If any problem is found in this part, it needs to be repaired.

The transfer case motor with a test light (Ohm preferably)

  • Place the yellow and orange wire on the actuator.
  • Getting into the motor itself, these two wires control the motor.
  • To ensure 200 ohms, place the probes on the orange and yellow wires. 
  • It will show you something above the 2.2 – 2.7 range which is abnormal and proves that you have a faulty motor.

Testing the transfer case motor with a battery back

  • By using a car battery or a portable jumper pack, a transfer case motor test is possible, and it’s an easy way.
  • Connect them to your transfer case motor jumper pack terminals with multimeter leads. 
  • To get the gear to move the test needed. You have to ensure that probes are connected to the orange and yellow wires.

Now the problem can be found easily

Due to low fluid levels or fuel leaking, mechanical damages such as damaged gears, loose chains, or bad bearings can often cause humming, growling, or grinding noise. To solve this problem, the condition of fluid, gears, chains, etc. should be checked.

In addition to your Strange Grinding, Growling, or Humming Noises, you may face several problems such as Having trouble shifting between gear ranges, low fluid level or damaged linkage issues.

You need to examine everything thoroughly. However, since many electronic tools have to be used. So you must be careful about using them.

Even in so many conditions if the transfer case motor causes problems. So without having to spend much to repair an old device, choosing a new one would be a smart choice.

Final Thought

Lastly, when you see the symptoms of a bad transfer case encoder motor, the bench test of this part of the car should be done before a more serious problem arises.

Otherwise, it can cause transmission damages or transaxle assembly damages. To save higher repair costs, you need to know how to bench test transfer case motors.

However, in-depth diagnosis of the vehicle requires the use of a high-end scan tool to figure out a difficulty. Which will at least save you money, time, and worries.

Related Search – How To Reset Transfer Case Control Module?


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