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Electric EZGO Electric EZ GO Marathon, Medalist, TXT and RXV. |
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Thread Tools | Display Modes |
03-12-2017, 05:02 PM | #1 |
Getting Wild
Join Date: Jan 2017
Posts: 88
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Faint glow on SOC meter even when off...
Since converting to 48v and changing the SOC meter to 48v, I notice that when I turn off the cart the SOC meter still has a very faint glow. Not on a certain indicator bar, but the entire thing -all bars/positions maintain a very dim glow. It is a standard Ezgo/Curtis 48v SOC meter.
It is wired straight from the battery through a circuit breaker and neg bus and the 3rd pin that turns on the display is coming from the key switch. It is a new EZGO uniquely keyed key switch, but I don't recall seeing that they were specific to 36 or 48v and worked fine at 36v. When I disconnect the 3rd pin to the key switch it is no longer glows. Is this likely from some "bleeding" voltage coming through the key switch? The reed switch has been bypassed and the ignition has been put first in the series of interlocks (before the F&R micro switch) so that I don't loose voltage to accessories when shifting past neutral. So there is voltage going direct to the ignition all the time - even when turned off or in neutral, but that voltage should be completely interrupted when the key is turned off. It is a very dim glow, but still seems like something that will drain batteries over time. I can cut it off at the kill switch breaker, but that's not always practical. Is this normal? I don't remember seeing it when I was 36v. Has anyone seen this or have a fix? Does the ignition switch need to be specifically for 48v? Thanks, 2006 TXT series |
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03-12-2017, 05:24 PM | #2 | |
Getting Wild
Join Date: Jan 2017
Posts: 88
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Re: Faint glow on SOC meter even when off...
Quote:
Think I got this resolved. Thought I had already checked, but the positive and keyswitch wires on the SOC meter were reversed that I found when checking with the meter. Seems to be turning off now with the keyswitch. 2006 TXT series |
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03-12-2017, 05:30 PM | #3 | |
Getting Wild
Join Date: Jan 2017
Posts: 88
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Re: Faint glow on SOC meter even when off...
Quote:
However, there IS a very small voltage coming through the keyswitch even when turned off of about 1.1mv. 2006 TXT series |
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03-13-2017, 10:03 AM | #4 | |
Techno-Nerd
Join Date: Jun 2011
Location: West Virginia
Posts: 19,654
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Re: Faint glow on SOC meter even when off...
Quote:
Wherever there is a conductive path, in this case about several million Ohms, some current will flow when a voltage is applied and and whenever current flows through resistance a voltage is developed across that resistance. This phenomenon is not seen with analog type voltmeters because their input impedance is typically about 20kΩ per volt and the meter itself provided a relatively low impedance parallel path and no voltage was registered on the meter. Even an El-cheapo DVM has a input impedance of 1MΩ or higher, so it does not load the circuit under test as much and will register some voltage. |
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03-16-2017, 04:03 PM | #5 |
Gone Mad
Join Date: Oct 2009
Location: Buford, GA
Posts: 8,988
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Re: Faint glow on SOC meter even when off...
Don't you miss the old Simpson analog volt, ohm, milliammeters (VOMs)? I don't have mine anymore.
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03-16-2017, 04:19 PM | #6 |
Gone Wild
Join Date: Jul 2015
Location: Georgetown, SC
Posts: 188
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Re: Faint glow on SOC meter even when off...
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03-16-2017, 04:26 PM | #7 |
Happy Carting
Join Date: Dec 2007
Location: Southern California
Posts: 73,358
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Re: Faint glow on SOC meter even when off...
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03-16-2017, 04:40 PM | #8 |
Techno-Nerd
Join Date: Jun 2011
Location: West Virginia
Posts: 19,654
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Re: Faint glow on SOC meter even when off...
My 260 bit the dust ages ago.
My wife hates DVM's and picked up an El-cheapo VOM at Radio Shack that has load test functions disposable batteries (AA, 9V etc.) and it is 20KΩ/V. I shanghai it when I want to check a pot for noise or get rid of phantom voltages, but woe is me if I don't put it back where she keeps it, or get it dirty. |
03-16-2017, 07:17 PM | #9 | |
Gone Insane
Join Date: Oct 2015
Location: TN/NC/GA Tri-state area
Posts: 3,952
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Re: Faint glow on SOC meter even when off...
Quote:
Bob |
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