A1 and A2. Sayyyy whaatt

[usagcr]

Silly question, but if you jack the golf cart up rear tires are off the ground. Depress the throttle a little, and put your voltmeter on A1 and read vdc, them put it on A2 and read vdc what should I be looking for ? And should they read the same? Would quarter throttle = approximately 9vdc on a 36v cart? I would think they would have close to same but I am getting wide differences from motor to motor (or at least the 4 I checked).

Thanks for helping

[JohnnieB]

The voltage drop across A1 to A2 is going to vary greatly depending on drive type (series or sepex) and how the high current circuit of a specific cart is wired.

In a sepex drive, full battery pack voltage is applied between A1 and A2, but in a series drive the field (aka stator) windings are in series with the armature, so only a portion of the battery pack voltage is applied between A1 and A2.


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Not quite sure what you are looking for with these voltage measurements.

[usagcr]

Was looking for different ways to check motors.

[JohnnieB]

Not any easy ways to check motors. Fortunately, the motor has a low failure rate and the most common failures are brushes and bearings.

An Ohmmeter between A1 & A2 will tell you if the brushes are gone and you'll hear the bearing.

Ohmmeter between F1 & F2 (aka S1 & S1) will tell you if the field is open.

Attached are sure fire ways to test both types.

[usagcr]

Thanks JohnnyB. Got it