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Old 01-16-2025, 09:20 AM   #11
InvalidUsername
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Default Re: Frame Ground Is 10V

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Originally Posted by Volt_Ampere View Post
Did you try the light bulb test? It only takes a little bit of stuff to make a high resistance path.
No I haven't tried light bulb test because I'm still trying to figure out the logic of how a current path can exist with lithium batteries sitting on wood inside of a plastic battery case that has been thoroughly cleaned more than once.

Nothing electrical in the cart is attached to any metal except at the motor. Carbon is a conductor. There's 18 years of carbon dust build-up inside my motor. It's logical to assume that some of that dust could be bridging between a bare electrical connection inside the motor and the metal motor case, which is attached to the frame. So it's real easy for me to see voltage leakage there.

So I'm not saying you're wrong, I just don't see it.
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Old 01-16-2025, 09:24 AM   #12
Volt_Ampere
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Default Re: Frame Ground Is 10V

The fact that it's 10V suggests a high resistance path. Do the lamp test and the voltage will probably drop to zero. It can be tricky to find out where that path is. You could be right that it's not at the battery if it's Lithium and in a clean case. If the lamp test shows that it's a high impedance leakage then you need to try disconnecting things until it goes away. I would NOT disconnect the motor wires with the battery hooked up though. That can damage the controller if wires touch.
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Old 01-16-2025, 09:44 AM   #13
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Default Re: Frame Ground Is 10V

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Originally Posted by Volt_Ampere View Post
The fact that it's 10V suggests a high resistance path. Do the lamp test and the voltage will probably drop to zero. It can be tricky to find out where that path is. You could be right that it's not at the battery if it's Lithium and in a clean case. If the lamp test shows that it's a high impedance leakage then you need to try disconnecting things until it goes away. I would NOT disconnect the motor wires with the battery hooked up though. That can damage the controller if wires touch.
So why would I look for other paths when there's an explainable path in the motor? I bet if I disconnect the motor leads the leak will go away
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Old 01-16-2025, 12:50 PM   #14
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Default Re: Frame Ground Is 10V

Try it. I have not seen that happen but it's certainly possible.
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Old 01-16-2025, 01:47 PM   #15
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Default Re: Frame Ground Is 10V

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Try it. I have not seen that happen but it's certainly possible.
Too much work lol. I'll let the OP try it if he wants
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