Performing a Stairmaster Stepper, Stepmill, Freeclimber Alternator Jumper Test
- In today's article, we will be discussing how to verify your Stairmaster alternator is functioning correctly
- The quickest way to determine if the alternator is the cause for your resistance issue is by performing what is called a jumper test
- To do this test, unplug the power on a PT machine and Stepmill or unhook the battery on a CL (cordless) machine
- Power remains disconnected for this test
- Remove the right shroud from the unit
- On back of alternator, locate the Field or FLD terminal
- This wire is usually brown
- Also, locate the terminal labeled Positive or B+
- The wire connected to this could be white or black depending on model
- Once you've located and disconnected the wires from these terminals carefully isolate them so they cannot short to anything during the test
- Now, you will need a jumper wire to proceed
- Hook one end of the jumper to the Field terminal and the other end to the B+ or Positive terminal
- It is very important that the jumper makes a good connection at both ends
- Once you have the jumper connected, proceed to step on the machine
- You will have to step fast to keep up for about 10-20 seconds
- After stepping on the unit, you will obtain full resistance if the alternator is working properly
- If your alternator passes this test, yet you still have a loss of resistance, you will need to further troubleshoot
- If you do not get resistance, than your alternator is the problem
- The common solution is to replace your alternator brushes
- First, make sure your jumper wire connection is good
- If not, you may produce a false negative result
- The common solution is to replace your alternator brushes
- You have completed the jumper test of the alternator for the Stairmaster steppers, stepmill, and freeclimber.
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