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Unread 01-22-2015, 04:45 PM   #1
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Default mystery voltage draw

1983 36v club car ds
having a problem with a mystery voltage draw & slow forward speed

the facts
new f/r switch
new solenoids (5) tested good
new micro switches (6) tested good
6 volt batteries (6) tested good

cart runs full speed in reverse
half speed in forward

after full charge .. 38.3 v
will drain down to 34v over night
disconnected all meters and 12v power acc...
still drains over night
here is the strange thing i found
key off
checking for voltage at the solenoids
0 volts in neutral
0 volts in reverse
1.1 volts in forward
(see attachment)

i am stumped !!!!

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File Type: jpg color sol pack volts.jpg (62.2 KB, 0 views)
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Unread 01-22-2015, 07:19 PM   #2
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Default Re: mystery voltage draw

I guess you probably know you have the FNR wired wrong due to the 1/2 speed in forward vs full in reverse.

That is also causing the reverse buzzer to be wired in series with the field coil between +48v and +24v when the FNR is in forward.

You can disconnect the reverse buzzer for testing and your mystery voltage should go away.
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Unread 01-22-2015, 08:35 PM   #3
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Default Re: mystery voltage draw

Quote:
Originally Posted by Sergio View Post
I guess you probably know you have the FNR wired wrong due to the 1/2 speed in forward vs full in reverse.

That is also causing the reverse buzzer to be wired in series with the field coil between +48v and +24v when the FNR is in forward.

You can disconnect the reverse buzzer for testing and your mystery voltage should go away.
i will triple check the f/r wiring ... but it is not wired for 1/2 speed reverse its full power both forward and reverse

sadly there is no reverse buzzer
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Unread 01-22-2015, 08:36 PM   #4
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Default Re: mystery voltage draw

The only thing on a golf cart that would drain the batteries dead overnight would be the motor not wired correctly. To verify this feel the motor after a period of no use and see if it's hot.
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Unread 01-22-2015, 08:55 PM   #5
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Default Re: mystery voltage draw

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Originally Posted by jjance View Post
The only thing on a golf cart that would drain the batteries dead overnight would be the motor not wired correctly. To verify this feel the motor after a period of no use and see if it's hot.
i will go feel it at 11 pm when i do my rounds ...
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Unread 01-22-2015, 09:15 PM   #6
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Default Re: mystery voltage draw

I had my first experience with one of these old carts last summer and was extremely pleased with how easy it was to work on. I would just double check all the wires to insure it is wired correctly...
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Unread 01-22-2015, 09:29 PM   #7
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Default Re: mystery voltage draw

I found the go pedal was not returning to zero, and it was running the batteries low
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Unread 01-22-2015, 09:32 PM   #8
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Default Re: mystery voltage draw

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Originally Posted by rib33024 View Post
I found the go pedal was not returning to zero, and it was running the batteries low
Great point; make sure all five solenoids click when the pedal is depressed, and that they all 'unclick' when released. The first one does not produce motion, the next four do
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Unread 01-22-2015, 09:48 PM   #9
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Default Re: mystery voltage draw

Quote:
Originally Posted by jakesnake27 View Post
Great point; make sure all five solenoids click when the pedal is depressed, and that they all 'unclick' when released. The first one does not produce motion, the next four do
Quote:
Originally Posted by rib33024 View Post
I found the go pedal was not returning to zero, and it was running the batteries low
applied 36v to each solenoid and they all clicked and unclicked

i did hear all five solenoids click in with a test run .. would that mean all are unclicking ?.. if one is open i would not here it click ?

edit : no volts in reverse ... if pedal was engaged i would see volts ???
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Unread 01-22-2015, 09:49 PM   #10
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Default Re: mystery voltage draw

I know a solenoid can click and still be bad, but I think they usually fail in the open position.
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