Need help with 36v to 48v conversion

scottyb · 05-04-2018, 04:51 PM

Maybe the pop you heard was the clack of the big solenoid engaging

MilitantCack · 05-04-2018, 05:30 PM

I hope so. I wanna put a hurtin on that stock motor before I get the D 2 from ya. 😃

MilitantCack · 05-04-2018, 08:48 PM

Okay so I charged it and am getting 54v. Under load I was getting around 51v near as I could tell because the solenoid pops and I get the red & green lights. So I jacked one tire up and tried it again. Turned the key and all is well. I push the petal down and the motor jumps and stutters for about two seconds before the solenoid pops again. Tire barely makes 2-3 revolutions. Thoughts?

MilitantCack · 05-05-2018, 04:43 PM

Did some more testing today. I checked that there was no voltage across the small terminals until petal was pushed and solenoid clicked open. I get pack voltage when peddle is pushed. I found that if I apply just enough throttle to get the tire spinning it does just fine but when I open it up to about half throttle the motor begins to stutter and the controller shuts down blinking green and red. Any suggestions is much appreciated.

scottyb · 05-06-2018, 02:10 PM

Unless the voltage is dropping significantly when you press the gas the install is incorrect. But I'm leaning towards a power supply problem or a loose cable connection?

PS if it does go DO NOT REV IT UP - you can blow the motor and that will be a nasty surprise.

Put the voltmeter on the pack the see what the reading is when the cart is trying to go but can not. If that reading drops less than 2-3v (wheel off the ground) then move the + test lead to the controller B+ ad repeat the test.

MilitantCack · 05-06-2018, 02:33 PM

Just tested and in both scenarios I got less than a 3 volt drop. Both when the wheel was barely spinning (off the ground) and when it stutters. Also got same results when putting the + lead on the B+.

MilitantCack · 05-06-2018, 03:26 PM

Not sure if the forward-reverse switch is wired correct. The guy I bought it from installed it. From looking at the wiring diagrams it looks like I might be wrong but I wanted your opinion first

MilitantCack · 05-06-2018, 03:28 PM

Oops. Forgot to upload pics. 😋

MilitantCack · 05-06-2018, 07:21 PM

Here’s a pic of how he wired the new forward-reverse switch. This can’t be right. But I’ll wait to see what you guys have to say before I go and make thinks worse. Lol

MilitantCack · 05-07-2018, 01:02 PM

Anybody have a chance to look at this switch before I tear into it and really mess things up. 😬

05-04-2018, 04:51 PM	#11
scottyb Happy Carting Join Date: Dec 2007 Location: Southern California Posts: 73,408	Re: Need help with 36v to 48v conversion Maybe the pop you heard was the clack of the big solenoid engaging

05-04-2018, 05:30 PM	#12
MilitantCack Not Yet Wild Join Date: Oct 2017 Posts: 30	Re: Need help with 36v to 48v conversion I hope so. I wanna put a hurtin on that stock motor before I get the D 2 from ya. 😃
MilitantCack Not Yet Wild Join Date: Oct 2017 Posts: 30

05-04-2018, 08:48 PM	#13
MilitantCack Not Yet Wild Join Date: Oct 2017 Posts: 30	Re: Need help with 36v to 48v conversion Okay so I charged it and am getting 54v. Under load I was getting around 51v near as I could tell because the solenoid pops and I get the red & green lights. So I jacked one tire up and tried it again. Turned the key and all is well. I push the petal down and the motor jumps and stutters for about two seconds before the solenoid pops again. Tire barely makes 2-3 revolutions. Thoughts?
MilitantCack Not Yet Wild Join Date: Oct 2017 Posts: 30

05-05-2018, 04:43 PM	#14
MilitantCack Not Yet Wild Join Date: Oct 2017 Posts: 30	Re: Need help with 36v to 48v conversion Did some more testing today. I checked that there was no voltage across the small terminals until petal was pushed and solenoid clicked open. I get pack voltage when peddle is pushed. I found that if I apply just enough throttle to get the tire spinning it does just fine but when I open it up to about half throttle the motor begins to stutter and the controller shuts down blinking green and red. Any suggestions is much appreciated.
MilitantCack Not Yet Wild Join Date: Oct 2017 Posts: 30

05-06-2018, 02:10 PM	#15
scottyb Happy Carting Join Date: Dec 2007 Location: Southern California Posts: 73,408	Re: Need help with 36v to 48v conversion Unless the voltage is dropping significantly when you press the gas the install is incorrect. But I'm leaning towards a power supply problem or a loose cable connection? PS if it does go DO NOT REV IT UP - you can blow the motor and that will be a nasty surprise. Put the voltmeter on the pack the see what the reading is when the cart is trying to go but can not. If that reading drops less than 2-3v (wheel off the ground) then move the + test lead to the controller B+ ad repeat the test.

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05-06-2018, 02:33 PM	#16
MilitantCack Not Yet Wild Join Date: Oct 2017 Posts: 30	Re: Need help with 36v to 48v conversion Just tested and in both scenarios I got less than a 3 volt drop. Both when the wheel was barely spinning (off the ground) and when it stutters. Also got same results when putting the + lead on the B+.
MilitantCack Not Yet Wild Join Date: Oct 2017 Posts: 30

05-06-2018, 03:26 PM	#17
MilitantCack Not Yet Wild Join Date: Oct 2017 Posts: 30	Re: Need help with 36v to 48v conversion Not sure if the forward-reverse switch is wired correct. The guy I bought it from installed it. From looking at the wiring diagrams it looks like I might be wrong but I wanted your opinion first
MilitantCack Not Yet Wild Join Date: Oct 2017 Posts: 30

05-07-2018, 01:02 PM	#20
MilitantCack Not Yet Wild Join Date: Oct 2017 Posts: 30	Re: Need help with 36v to 48v conversion Anybody have a chance to look at this switch before I tear into it and really mess things up. 😬
MilitantCack Not Yet Wild Join Date: Oct 2017 Posts: 30

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