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Unread 08-15-2008, 04:41 PM   #21
Not Yet Wild
 
Join Date: May 2008
Location: South Central Illinois
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Default Re: 87 ezgo voltage leaking to frame, I think?

I been going over wires as I troubleshoot-I have most of the wires in loom but besides a wire rubbing frame what else might allow me to show voltage on frame with blk on negative side of battery and when I put red on frame I get voltage that is coming from somewhere-not the motor it checked out good.
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Unread 08-15-2008, 05:06 PM   #22
steeplejack x
 
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Default Re: 87 ezgo voltage leaking to frame, I think?

This comes from an EZGO tech with bunches more experience than I. Sure to make this clear as mud. I knew this had been discussed... You keyed my memory when you said you referenced to neg side of pack.

**** CRS.

"The chassis is a "floating ground." It will usually read a voltage between 0 and 36 volts. Although it reads a voltage that "floats", it will read a voltage from the lowest resistance to any point in the set. You will likely see a different voltage with temperature, humidity, etc without changing anything. There should be no current flow possible from the chassis, unless an extra pair of wires is added to make a circuit."

...and this from an electronic guru:

"I had one person say they had an issue with frame ground even though they used an accessory battery and they were certain the wires were isolated. This got me thinking: the only way power could cross into the 12V system without physical contact would be through inductance (like the secondary on a transformer). It takes an AC current or a pulsed DC current to inductively cross conductors that are not in physical contact with each other. So between a motor which is a huge inductor and these electronic controllers which are "pulsed" DC it could be possible to get some current from your battery pack into the 12V system if the wires are run too close together."
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Unread 08-15-2008, 05:15 PM   #23
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Default Re: 87 ezgo voltage leaking to frame, I think?

Might be something to that pg-I can hold red meter lead and get 33volts on meter and when i put needle probe to frame it reads 36volts-at first I thought I found a broken wire/terminal post broken but found out meter fluxuating was actually me touching frame of cart and that made meter go up and down-nowhere I can see where it could be bleeding through from but thought maybe the solenoid/controller/motor might be the source of the floating voltage.
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Unread 08-15-2008, 05:25 PM   #24
steeplejack x
 
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Default Re: 87 ezgo voltage leaking to frame, I think?

"The batteries can cause an effect much like a capacitor; you get a voltage potential from a battery to the frame without physical contact from a post much the same way a capacitor works."

Clean every battery with baking soda and water and rinse thoroughly to remove any acid residues and then check voltage again. I'm betting the acid is acting as a conductor.
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