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Old 08-08-2019, 08:01 AM   #1
3491yrennalf
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Question 1999 ezgo dcs motor test

I have a 1999 ezgo 36v dcs cart with no batteries. I want to test the motor using a jump start 12v charger. I think the test hookup is different for a dcs model. Motor terminals are s1,s2 a1 and a2. Cart does have the fr handle on front panel under seat and a run/tow switch. Any ideas? First time poster so I hope I did this right.
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Old 08-08-2019, 08:30 AM   #2
Fairtax4me
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Default Re: 1999 ezgo dcs motor test

To test the Motor first lift the rear of the cart off the ground. Put the cart in tow mode and disconnect the battery pack negative. Disconnect the wires from all 4 motor terminals.
Jumper the A1 and F1 terminals together.
Jumper the A2 and F2 terminals together.
Connect 12V positive to the A/F1 pair.
Connect 12v negative to the A/F2 pair. The motor should spin.

You should also test the motor with a continuity tester.
You Should Have Continuity:
From A1 to A2
From F1 to F2
You should NOT Have continuity:
From any A to F terminal
From any A or F terminal to the motor case.
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Old 08-08-2019, 10:03 AM   #3
3491yrennalf
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Default Re: 1999 ezgo dcs motor test

The terminals on my motor are a1 and a2 and s1 and s2. Does this make a difference since I do not have the f1 and f2
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Old 08-08-2019, 11:17 AM   #4
cgtech
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Default Re: 1999 ezgo dcs motor test

Is your cart a Series cart, instead of Sepex like original poster?
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Old 08-08-2019, 11:30 AM   #5
3491yrennalf
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Default Re: 1999 ezgo dcs motor test

I believe it is a dcs sepex.
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Old 08-08-2019, 11:51 AM   #6
rib33024
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Default Re: 1999 ezgo dcs motor test

The motor in a dcs cart is marked A1 A2 S1 S2. I have always wondered why.
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Old 08-08-2019, 12:06 PM   #7
3491yrennalf
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Default Re: 1999 ezgo dcs motor test

Any idea on how to test it? I found a diagram that appears to indicate that the cart is a sepex dcs model.
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Old 08-08-2019, 01:02 PM   #8
JohnnieB
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Default Re: 1999 ezgo dcs motor test

Here is how to test a sepex motor.

The motor has no front bearings, so it has to be mounted on the differential to spin test or it will be damaged.

The rear tires have to be lifted off the ground and 12V might not be enough to get it to spin the tires, but if you give it some help by getting the tires spinning by hand, they'll probably stay spinning.
Attached Images
File Type: jpg Motor Test - Sepex.jpg (91.7 KB, 0 views)
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Old 08-08-2019, 01:14 PM   #9
3491yrennalf
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Default Re: 1999 ezgo dcs motor test

Thanks, I will try it. Not sure why the diagram shows f1 in picture but s1 and s2 in description.
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Old 08-08-2019, 01:42 PM   #10
JohnnieB
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Default Re: 1999 ezgo dcs motor test

Quote:
Originally Posted by rib33024 View Post
The motor in a dcs cart is marked A1 A2 S1 S2. I have always wondered why.
A = Armature
S = Stator
F = Field

Stator and Field both identify the stationary windings and can be used interchangeably, but the stationary winding in a series motor is typically called Stator and labeled S, while the stationary winding in a sepex (SEParately EXcited) motor is typically called Field and labeled F.

The DCS motor is probably the best known exception. It was EZGO's first sepex drive and I suspect nobody gave much thought to how the motor terminals were labeled and continued to use the same labeling they had always used until it became apparent you cannot tell the difference between a mounted series motor and a DCS (sepex) motor if the label is missing or unreadable.

Starting with the sepex motor used in the PDS, the DCS's replacement, the terminals for the stationary winding terminals are labeled "F" and the studs are smaller diameter then the armature terminal studs, so even if the label is missing you can visually identify a mounted sepex motor by it having two larger studs and two smaller studs while all 4 studs on a series motor are the same size.

As mentioned, this is speculation, but it the best answer I've been able to come up with.
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