1995 Club Car DS Potentiometer

[Aflyer]

Hi guys, I need some help diagnosing and fixing the neighbors golf car.

It is a late 1995 DS, serial # begins with A9530.

The cart is only running at about half speed, but the worse problem is the shuddering on acceleration.

I have read several threads about slow speed and testing a Potentiometer problem, but non seem to include the shuddering symptoms we have.

I have tested the pot using green and yellow wire at the Controller, and get varied results. testing with an old analog meter, on the 1K range, I get 10, or 10,000 at no pedal and 5,000 at full pedal.

I hate to pull the pot out and replace it only to find out that isn't the problem.

Open to your suggestions, for further testing.

Thank you,
gkcooper

[scottyb]

Get a digital meter, it's 2017
But yes the correct signal is 0-5000 Ωs from this device.

Shuddering - sounds like one or more bad batteries.

[Aflyer]

scotty,
Thanks for the quick response, and yes I need to go get my meter.

The battery pack does have one weak battery, but is currently putting out 55 volts from recent charge. Cart is up on Jack stands and still shudders or bucks on hard acceleration.

And only reading about 50 at the Motor connections. Took it for a drive still shudders on acceleration.

No real answers yet.

[scottyb]

Bad battery or high amp connection. What does the pack voltage read when the solenoid is getting hammered (shuddering)?

[Aflyer]

Oh ****, I am back home, will try that test tomorrow.

He added a lot of water to the batteries, a couple of them were right at the top of the plates. It has only been through one charge cycle since the water was added, so we put it back on charge about an hour ago.

Will check it again in the morning, and do the battery check under load.

Now how do you do a battery check under load? We were testing today with cart on stands, I don't think that really simulate under load, but hard to drive cart with meter connected.

Thank you!!

[TahoeDawgZ71]

It's a pot-box and it's way out of range. I've seen it numerous times. Your best bet is to replace the pot-box with an MCOR4 conversion kit. Part number AM293201. Parts are no longer available for the pot-box. It's supposed to be 5k-0 from no throttle to full throttle. This will fix your throttle signal issues, but a potentiometer issue won't cause shuddering on acceleration. This sounds more like a low voltage issue.

[scottyb]

You sure dawg? 1995

[Roxyflash]

Using the old analog meter if the sweep is nice and steady tru the range i would rule out the pot .Those old meters if its a good one for testing a pot is better in my opinion then digital.If there is no dead spot i dont believe thats the problem.Is this a motor controller cart i had one do the same was a bad controller.

[TahoeDawgZ71]

Originally Posted by scottyb

You sure dawg? 1995

Positive. It's after week 16.

[scottyb]

Originally Posted by TahoeDawgZ71

Positive. It's after week 16.

How do you get that? 1995 week 30 ?