lifted club cars - lifted ezgo
Home FAQDonate Who's Online
Go Back   Buggies Gone Wild Golf Cart Forum > Golf Cart Repair and Troubleshooting > Electric EZGO
Electric EZGO Electric EZ GO Marathon, Medalist, TXT and RXV.



Post New Thread  Reply
Thread Tools Display Modes
Unread 01-01-2013, 03:00 PM   #11
Gone Mad
E-Z-GO
 
Join Date: Oct 2009
Location: Buford, GA
Posts: 6,523
Default Re: Powerwise charger problem

Scratch that. Looking at your photos, it appears one side of the ammeter IS grounded.
yurtle is offline   Reply With Quote
Alt Today
BGW

Golf car forum Sponsored Links

__________________
This advertising will not be shown in this way to registered members.
Register your free account today and become a member on Buggies Gone Wild Golf Cart Forum
   
Unread 01-02-2013, 05:20 AM   #12
Techno-Nerd
 
JohnnieB's Avatar
E-Z-GO
 
Join Date: Jun 2011
Location: West Virginia
Posts: 13,998
Default Re: Powerwise charger problem

Quote:
Originally Posted by yurtle View Post
Scratch that. Looking at your photos, it appears one side of the ammeter IS grounded.
Actually, there is no ground on the secondary side of the transformer.
The chassis and primary side is grounded via the AC power cord, but the secondary is isolated from ground.
Grated, one ammeter post is electrically connected to the metal plate it is mounted on, but that metal plate (Heat sink) is isolated from the chassis by the non-conductive stand-offs that hold it in place.

The cathodes of the diodes are connected to the heat sink, so the heat sink is the source for the B+ (positive DC output).
Note that the Red wire to the control board is attached to the heat sink.

The other ammeter post goes through a larger hole that has an insulator in it, so it isn't directly connected to the heat sink and that is where the white wire (Positive DC output) in the output cable attaches, via 50A fuse. But it is directly connected in the photo.

The loose Black wire shown in first and last photo is the Negative DC output and should be connected to the two white wires coming out of transformer secondary.

The fuse can be placed in either the Positive or Negative DC output path.

--------------
Since the cart has been eliminated as the problem source, we are down to just two possibilities.
1. Bad diode(s)
2. Short between Positive and Negative DC output current paths.

-------------
Considering that at least two 50A fuses have blown and the current has to pass through the 35A rated diodes, I suspect the diodes need to be replaced even if they were not the root cause of the fuses blowing,
Attached Images
File Type: jpg Powrewise Charger Schematic.JPG (47.4 KB, 0 views)
JohnnieB is offline   Reply With Quote
Unread 01-02-2013, 10:31 AM   #13
Gone Wild
E-Z-GO
 
Join Date: Jan 2011
Location: mascoutah,il
Posts: 219
Default Re: Powerwise charger problem

Johnnie,When we took the cover off of the charger there is a white wire to one post on the amp meter the other post had nothing connected to it,is this correct?
busman9 is offline   Reply With Quote
Unread 01-02-2013, 10:56 AM   #14
Techno-Nerd
 
JohnnieB's Avatar
E-Z-GO
 
Join Date: Jun 2011
Location: West Virginia
Posts: 13,998
Default Re: Powerwise charger problem

Quote:
Originally Posted by busman9 View Post
Johnnie,When we took the cover off of the charger there is a white wire to one post on the amp meter the other post had nothing connected to it,is this correct?
Yes, or at least it will work that way.
Looking from the backside, the Ammeter terminal on the left is electrically connected to the heat-sink it is mounted on.
The terminal on the right passes through the heat-sink via an insulator.
The schematic shows the 50A fuse connected to the right side terminal and the output cables white wire connected to the other side of the fuse.
JohnnieB is offline   Reply With Quote
Unread 01-02-2013, 02:08 PM   #15
Gone Wild
E-Z-GO
 
Join Date: Jan 2011
Location: mascoutah,il
Posts: 219
Default Re: Powerwise charger problem

Johnnie,Transformer is shorted,where would I get one? Do you have a part #? Is it worth fixing or should we look at DPI charger like ScottyB sells? Thanks for your help!
busman9 is offline   Reply With Quote
Unread 01-02-2013, 03:38 PM   #16
Techno-Nerd
 
JohnnieB's Avatar
E-Z-GO
 
Join Date: Jun 2011
Location: West Virginia
Posts: 13,998
Default Re: Powerwise charger problem

Just curious, but how did you determine the transformer is shorted?
Any of the four sets of windings will only measure a few Ohms on an Ohmmeter.

The transformer can be replaced, but it is not economically feasible to do so since it costs almost the same as the entire charger and more that a DPI from Scotty.

If the transformer is bad, go with the DPI.
JohnnieB is offline   Reply With Quote
Unread 01-02-2013, 07:33 PM   #17
Gone Wild
E-Z-GO
 
Join Date: Jan 2011
Location: mascoutah,il
Posts: 219
Default Re: Powerwise charger problem

Johnnie,2 wire wires from transformer,1 wire test .400 the other test 0 (shorted) ? If you plug the charger in and touch the two wires together sparks everwhere. Do you agree the transformer is shorted or I am missing something? Thanks
busman9 is offline   Reply With Quote
Unread 01-03-2013, 05:09 AM   #18
Techno-Nerd
 
JohnnieB's Avatar
E-Z-GO
 
Join Date: Jun 2011
Location: West Virginia
Posts: 13,998
Default Re: Powerwise charger problem

Which wires? There are EIGHT wires coming out of the charger!

Attached is how to check the transformer.
Attached Images
File Type: jpg Transformer-Capacitor test.JPG (66.2 KB, 0 views)
JohnnieB is offline   Reply With Quote
Unread 01-03-2013, 05:49 AM   #19
Gone Wild
E-Z-GO
 
Join Date: Jan 2011
Location: mascoutah,il
Posts: 219
Default Re: Powerwise charger problem

Johnnie,If you look at the photos we are checking the 2 white wires
busman9 is offline   Reply With Quote
Unread 01-03-2013, 06:24 AM   #20
Techno-Nerd
 
JohnnieB's Avatar
E-Z-GO
 
Join Date: Jun 2011
Location: West Virginia
Posts: 13,998
Default Re: Powerwise charger problem

There are four white wires.

Two go to the capacitor, but the two you are most likely referring to are the two circled in red on attached photo.

Those two wires are are connected together to create the center tapped winding needed for a full-wave rectifier out of two separate windings.
The other end of those two white wires are the black wires (circled in blue) connected to the diodes.

Bolt those two white wires together without connecting the black wire going to the charger's output cable to them.
Disconnect the black wires connected to the diodes.
Select AC Volts on your DVM, and attach one test lead to each of the black wires that were disconnected from the diodes.
Plug charger into cart and into AC wall outlet.
You should read about 90VAC.

IF not, either the transformer and/or capacitor is bad.
Attached Images
File Type: jpg powerwise charger 005 - edited.JPG (209.3 KB, 0 views)
JohnnieB is offline   Reply With Quote
Reply
Go Back   Buggies Gone Wild Golf Cart Forum > Golf Cart Repair and Troubleshooting > Electric EZGO


Thread Tools
Display Modes


Similar Threads
Thread Forum
EZGO PowerWise II charger problem Electric EZGO
Powerwise Charger Problem Electric EZGO
Powerwise charger problem Electric EZGO
Powerwise 36v Charger Problem Electric EZGO
EZGO Powerwise charger problem Electric EZGO


All times are GMT -5. The time now is 01:09 AM.


Club Car Electric | EZGO Electric | Lifted Golf Carts | Gas EZGO | Used Golf Carts and Parts

Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
Content Relevant URLs by vBSEO ©2011, Crawlability, Inc.