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Old 04-22-2020, 10:54 AM   #1
Bitm
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Default Cart only shudders/shakes? What could this be

This has happened twice now.

New Alltrax controller, Motor, solenoid, cables, etc so was shocked when this happened to us a few weeks ago.

First time: We had driven for a 30+ mins with no problem, came to complete stop for a few mins then it would not go forward or backwards, would only shudder/shake, no forward or back. Towed it home and found a lose nut on a cable. Thought that must have been the prob

About a week of daily use with no problem u til just now

Second time: drive intermittently (starting and stopping) for about 10 mins, came to full stop and once again, no forward or back, just shakes

I’ll try and post some pics of the current setup


What could this be?



Sent from my iPhone using Tapatalk
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Old 04-22-2020, 11:07 AM   #2
Fairtax4me
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Default Re: Cart only shudders/shakes? What could this be

I see a couple things that stand out right away.
One is how the B+ cable is attached at the controller. With those cable ends stacked like that I don't see how it's making a good connection there.

Also looking at the Negative connection from the OBC, can't tell in the pic, but is the small cable on top or below the big cable? The large cable needs to be on first then the small cable.

The Fuse on the Pack positive battery post IMO should be moved either to the Solenoid or to it's own fuse block. You will end up with corrosion on the fuse with it on the battery, and those fuses are not cheap.
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Old 04-22-2020, 11:30 AM   #3
Matt01
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Default Re: Cart only shudders/shakes? What could this be

Fairtax, thanks for he insights, I'm pretty new and still learning so very much appreciated.

the 2 4G wires on the B+ post are tight but I can see how they look funny in the pic.

The larger 4G wires are on the "bottom" of each connection with smaller gauge connectors stacked on top at all locations (with the exception of the diode on the solenoid that is on the bottom of those posts)

That particular wire (from back of OBC) shows to go to the B- terminal in all the wiring diagrams I saw but I figured going to that post (which goes directly to the B-) should be the same thing... is that causing a problem?

I will move the fuse based on your suggestion

thanks again,
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Old 04-22-2020, 11:41 AM   #4
Matt01
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Default Re: Cart only shudders/shakes? What could this be

Just to be clear, I am the original poster, not sure why name appears diff in this post from my phone vs the PC...
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Old 04-22-2020, 12:34 PM   #5
jakesnake27
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Default Re: Cart only shudders/shakes? What could this be

Quote:
Originally Posted by Matt01 View Post
Just to be clear, I am the original poster, not sure why name appears diff in this post from my phone vs the PC...
You're using two different user accounts- one on your phone and another on your PC
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Old 04-22-2020, 12:52 PM   #6
jeffro22
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Default Re: Cart only shudders/shakes? What could this be

mine did almost same thing when my main solenoid failed. not sure if thats right place to look or not. Have you tested voltage
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Old 04-22-2020, 01:25 PM   #7
rib33024
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Default Re: Cart only shudders/shakes? What could this be

Quote:
Originally Posted by Matt01 View Post
Just to be clear, I am the original poster, not sure why name appears diff in this post from my phone vs the PC...
I will check on this. Do you have more than one account? That's about the only way I can see this happening. Both user names have the same IP Address. But they have a different member number.
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Old 04-22-2020, 02:29 PM   #8
Matt01
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Default Re: Cart only shudders/shakes? What could this be

Ok, the username account thing is resolved! the tapatalk app defaulted to a diff email so i guess i have 2 accounts... the cart issue still ongoing! LOL


It was fully charged before the 10min ride this morning that resulted in the problem.

right now it is reading 50V all the way to the B+ and B- of the controller.

The first time this happened I stripped it all down looking for the loose connection, thus resetting the OBC. I'm tempted to try that now but dont want to reset just to have this happen again later.

any other ideas?

thanks all,
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Old 04-22-2020, 05:19 PM   #9
Matt01
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Default Re: Cart only shudders/shakes? What could this be

update - tried the pedal again and this time it shook for a minute them the solenoid clicked and it started working!

looks like the problem may be with the solenoid.

still figuring things out...
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Old 04-22-2020, 05:28 PM   #10
Mooncarter
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Default Re: Cart only shudders/shakes? What could this be

What is pack voltage?
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