Jerky start???

eadavis · 09-07-2018, 08:06 AM

Hello I am trying to troubleshoot my father-in laws cart which I built several years ago. It is a 1999 ezgo DCS lifted cart with rear seat/bed converted to 48 volt with alltrax 400 controller and white rogers solenoid. The cart shutters when trying to start but once you get it going it seems to run ok according to him and I actually verified that was in fact happening. I used all the troubleshooting guides and it seemed to lead me to the ITS so I replaced it and still has same problem. Pack voltage seems good even when throttle is pressed and cart shutters and barely moves and controller is not giving any codes but cart still shutters. I have also tried bypassing solenoid with large jumper across large terminals. I am not sure of what else to try to diagnose problem and resolve issue. I am sure it is possible the brushes could be bad in motor. How do I verify motor is good and what other things can I test to revolve this issue.

LukeL · 09-07-2018, 08:08 AM

Quote:

Originally Posted by eadavis

Hello I am trying to troubleshoot my father-in laws cart which I built several years ago. It is a 1999 ezgo DCS lifted cart with rear seat/bed converted to 48 volt with alltrax 400 controller and white rogers solenoid. The cart shutters when trying to start but once you get it going it seems to run ok according to him and I actually verified that was in fact happening. I used all the troubleshooting guides and it seemed to lead me to the ITS so I replaced it and still has same problem. Pack voltage seems good even when throttle is pressed and cart shutters and barely moves and controller is not giving any codes but cart still shutters. I have also tried bypassing solenoid with large jumper across large terminals. I am not sure of what else to try to diagnose problem and resolve issue. I am sure it is possible the brushes could be bad in motor. How do I verify motor is good and what other things can I test to revolve this issue.

I was also going to suggest checking the motor brushes. You will need to remove and disassemble the motor.

Club Car DS driver’s club #59

BobBoyce · 09-07-2018, 10:12 AM

DCS motors do not last long when operated at 48V. They last longer and operate best at 42V. You might want to start looking for a replacement.

not-so-ezgo · 09-12-2018, 03:40 PM

I had this... It was a loose wire on the FR switch. I have a series Medalist.. for reference.

WalterM6 · 09-12-2018, 06:16 PM

Have you connected your computer and did the Auto-Cal on the throttle?

09-07-2018, 08:06 AM	#1
eadavis Gone Wild Join Date: Jan 2009 Location: Texas Panhandle Posts: 170	Jerky start??? Hello I am trying to troubleshoot my father-in laws cart which I built several years ago. It is a 1999 ezgo DCS lifted cart with rear seat/bed converted to 48 volt with alltrax 400 controller and white rogers solenoid. The cart shutters when trying to start but once you get it going it seems to run ok according to him and I actually verified that was in fact happening. I used all the troubleshooting guides and it seemed to lead me to the ITS so I replaced it and still has same problem. Pack voltage seems good even when throttle is pressed and cart shutters and barely moves and controller is not giving any codes but cart still shutters. I have also tried bypassing solenoid with large jumper across large terminals. I am not sure of what else to try to diagnose problem and resolve issue. I am sure it is possible the brushes could be bad in motor. How do I verify motor is good and what other things can I test to revolve this issue.

09-07-2018, 10:12 AM	#3
BobBoyce Gone Insane Join Date: Oct 2015 Location: TN/NC/GA Tri-state area Posts: 3,952	Re: Jerky start??? DCS motors do not last long when operated at 48V. They last longer and operate best at 42V. You might want to start looking for a replacement.

09-12-2018, 03:40 PM	#4
not-so-ezgo Not Yet Wild Join Date: Oct 2017 Posts: 38	Re: Jerky start??? I had this... It was a loose wire on the FR switch. I have a series Medalist.. for reference.
not-so-ezgo Not Yet Wild Join Date: Oct 2017 Posts: 38

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09-12-2018, 06:16 PM	#5
WalterM6 Gone Wild Join Date: Apr 2017 Location: SE TN Posts: 2,226	Re: Jerky start??? Have you connected your computer and did the Auto-Cal on the throttle?