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Old 11-22-2022, 08:56 PM   #1
twistr25
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Default 1999 EZGO TXT Not running after lithium upgrade

Hi all,
1999 EZGO TXT - So I found another post of a guy that did a 36v lithium upgrade. Bought his parts list and feel like I followed the same installation steps. My battery meter is showing correctly and I get my lights to turn on, but when I test for power to the motor....nothing. My old setup had a killswitch that I removed, so not sure if there is a jumper somewhere that thinks it's still engaged. I've volt tested in the controller area and getting full juice there. When I test the terminals on the motor, I only see 12v at each, but not sure if that's all it's supposed to be. Any one have any suggestions of other things to test or try?
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Old 11-23-2022, 07:43 AM   #2
jasonojordan
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Default Re: 1999 EZGO TXT Not running after lithium upgrade

I would start with rechecking your battery wiring since that was the last thing that as done based off the information given.

Was anything else done at this same time? Have you checked to make sure your pack voltage is 36v? Wiring looks goofy in that last picture thats why I ask.
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Old 11-23-2022, 08:11 AM   #3
twistr25
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Default Re: 1999 EZGO TXT Not running after lithium upgrade

I didn't change any other wiring other than removing that killswitch that was located up at the original charger receptacle. I did originally remove the old battery monitor, but then put it back in line (I think correctly) in case that was leaving a gap in the circuit, but those are the only things I touched outside of just replacing the batteries and adding the reducer.
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Old 11-23-2022, 08:19 AM   #4
twistr25
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Default Re: 1999 EZGO TXT Not running after lithium upgrade

Quote:
Originally Posted by jasonojordan View Post
I would start with rechecking your battery wiring since that was the last thing that as done based off the information given.

Was anything else done at this same time? Have you checked to make sure your pack voltage is 36v? Wiring looks goofy in that last picture thats why I ask.
Yes, off my final legs and from the shunt, I'm actually getting like 39v with them all together. I can get that same voltage measured over at the top of the controller as well.

The only place it is "low" is I get ~12.5v at each of the posts on the motor itself. Not sure what they should be though.
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Old 11-23-2022, 08:21 AM   #5
kgsc
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Default Re: 1999 EZGO TXT Not running after lithium upgrade

Here is the activation circuit
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Old 11-23-2022, 09:12 AM   #6
scottyb
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Default Re: 1999 EZGO TXT Not running after lithium upgrade

I may be seeing a wire missing on the F&R micro switches. Looks like you are missing the Battey + there. May have something to do with the 'killswitch' you eliminated from the charge receptacle. That was the original + supply to the F&R ms.
Blue wire supplies power to the keyswitch. I'm guessing you have no power to the keyswitch. I could be wrong
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Old 11-23-2022, 09:58 AM   #7
twistr25
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Default Re: 1999 EZGO TXT Not running after lithium upgrade

This is kind of what I'm thinking too, though I can't quite trace it back. I did have one spade that I don't recall pulling off, but a pair is off the back side of the switch. I can't remember if I tried reconnecting that and trying again.
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Old 11-23-2022, 11:25 AM   #8
scottyb
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Default Re: 1999 EZGO TXT Not running after lithium upgrade

You need a 18g full battery + to the micro switches.
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Old 11-23-2022, 11:44 AM   #9
twistr25
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Default Re: 1999 EZGO TXT Not running after lithium upgrade

Quote:
Originally Posted by scottyb View Post
You need a 18g full battery + to the micro switches.
Yep, that was it, I found it a little earlier. Just jumped from that top spade on the microswitch to my positive group.

Running 20mph up from 17ish.

Thanks all!
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Old 11-23-2022, 12:19 PM   #10
scottyb
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Default Re: 1999 EZGO TXT Not running after lithium upgrade

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Originally Posted by twistr25 View Post
Yep, that was it, I found it a little earlier. Just jumped from that top spade on the microswitch to my positive group.

Running 20mph up from 17ish.

Thanks all!
Glad we could help. Be careful and enjoy the rides
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