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Unread 03-19-2017, 06:38 PM   #1
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Default 1995 EZ GO Medalist Faint buzzer/alarm when battery cables connected

Installed new batteries, referred to diagram posted on here to confirm proper connection. When the main negative cable is hooked up there is a quiet buzzer/ring tone like a very muted back up buzzer.

Is this some sort of warning letting me know I have something hooked up wrong?
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Unread 03-19-2017, 08:54 PM   #2
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Default Re: 1995 EZ GO Medalist Faint buzzer/alarm when battery cables connected

Noise is coming from controller because when I unhook the plug from the top it stops. Just don't know why it's making it in the first place.
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Unread 03-20-2017, 10:21 AM   #3
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Default Re: 1995 EZ GO Medalist Faint buzzer/alarm when battery cables connected

Noise isn't coming from controller, it's coming from the back up buzzer. I just don't understand why it's on. Keys off, cart in forward, constant quiet tone.
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Unread 03-20-2017, 11:57 AM   #4
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Default Re: 1995 EZ GO Medalist Faint buzzer/alarm when battery cables connected

Sounds like you have a DCS drive cart since the sound goes away when the plug on the controller is unplugged. (Has Run/Tow switch on controller cover)

In a DCS, the beeper has B+ applied to it 100% of the time (Red wire) and the controller applies B- to the other side (black wire or grn/blk), so there could be a phantom circuit (corrosion or conductive dirt) providing a little B-, or the controller is sick.
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Unread 03-20-2017, 01:06 PM   #5
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Default Re: 1995 EZ GO Medalist Faint buzzer/alarm when battery cables connected

Based off the info provided on the "series or sepex" post. Mine is a series motor. The F/R switch and the controller look the same and it has no tow/run switch.

The buzzer is mounted on the F/R switch, or at least the part making the noise is because I can feel it vibrate and actually mute it by holding a finger on it.
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Unread 03-20-2017, 02:27 PM   #6
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Default Re: 1995 EZ GO Medalist Faint buzzer/alarm when battery cables connected

With a series drive the beeper has B- applied to it 100% of the time and to get it to sound, B+ has to be applied to the other side.

Normally this happens when the contacts in MS-4 on the F/R switch assembly close.

Could be cross-talk between the terminals on MS-4 (microswitch) due to corrosion or conductive dirt. Could be a bad microswitch, they are not well sealed and gunk gets inside.

The beepers work on a very wide range of voltages and need very little current, so it doesn't take much of an undesired conductive path to get them to put out a low volume sound.

B+ to the beeper is highlighted in red on the attached schematic. B- is in blue.
Attached Images
File Type: jpg Wiring Diagram - Series - Beeper traced.JPG (58.8 KB, 0 views)
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Unread 03-20-2017, 03:19 PM   #7
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Default Re: 1995 EZ GO Medalist Faint buzzer/alarm when battery cables connected

Thanks JohnnieB.
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Unread 03-20-2017, 10:14 PM   #8
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Default Re: 1995 EZ GO Medalist Faint buzzer/alarm when battery cables connected

I was gonna say the same. Clean the back of the switch where the wires & screw terminals are. Just a little crud there will do it. Even washing the cart will do it.
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