Battery Charger Reed Switch Wire Bi-Passed

[Rustnut]

Hi There.
Just bought a project cart and in the process of figuring out the charging problems (Many Thanks to This Site!!) I noticed the Red Reed Switch wire inside the charger has been bi-passed directly to the Charger's Neg output.
IE: the red wire connected the PC board does not go to the Cart Plug but rather to the Neg out terminal.
It seems to charge OK this way but I'm wondering, Why someone would do this and should I put it back where it belongs?

[COURTESYCART]

some do this cause the reed switch is expensive and moving a wire is cheap.

I have actuatly seen new carts from EZGO not have a reed switch.

One thing that bothers me about yours is its connected to the negative side and not postive side like it should be.

[Rustnut]

Should I put it back to see what happens?
Per the wiring diagram the reed switch wire should be to the battey return Neg.......Right??

[JohnnieB]

Originally Posted by Rustnut

Should I put it back to see what happens?
Per the wiring diagram the reed switch wire should be to the battey return Neg.......Right??

Can you post the wiring diagram you are looking at?
I've never seen one with the reed switch connected to the battery pack negative.

Which body style and drive type do you have?

[Rustnut]

Thanks for the reply and sorry for the delay.
The cart is a 2003 TXT Model D303 serial 1592655

I put the reed switch wire back and it would not consistently pull in the charger start relay so I returned the wire to bi-pass.
The wiring diagram I'm looking at is on page 142 of the EZGO manuel found here on the sticky note on the main page.
(Havent figured out how to post a doc yet)

Thanks!!

[JohnnieB]

Here is how EZGO describes the cart with the serial number you posted.
Search Results
Make: TXT
Type: Electric 36 V
Model: TXT Standard
Year: 2003

So your cart is a "2003 TXT Series"
(Series meaning it has a series wound motor)

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I went back and re-read your first post, a lot closer this time.

You are mixing two separate circuits.
1. The charger's battery sense circuit senses the cart's battery pack voltage via the Auxiliary contact in the charger plug touching the outside of the negative terminal in the cart's charge receptacle.
The Auxiliary contact in the plug is Item #36 in the first attachment.
The Negative terminal in the receptacle is the brass object with the black wire connected to it in the second attachment.
The reed switch is not in any way, shape or form, associated with the battery sense circuit.

2. The reed switch is physically located in the cart, inside the charge receptacle. It is the black blob with a red wire that connects to the positive terminal.
The positive terminal is the brass object with a white wire connected to it in second attachment.
The purpose of the reed switch is to disable the cart when the charge plug is inserted into the charge receptacle.
Item # 39 in the plug drawing (first attachment) is a magnet and it opens the reed switch when the plug is inserted in the receptacle.

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A Powerwise (No suffix) battery charger schematic is located on Page K-6 of the Service manual posted in the Stickies.
When the .pdf file is viewed in Adobe Acrobat Reader, it is listed as page 142 of 288.
Attachment three is that schematic.
Attachment four is a picture of the charger that schematic is for.
Is it the charger you have?
(Different model chargers are wired differently. Just want to be sure we are looking at correct schematic for your charger)

The fact that your charger does not turn on consistently when the battery sense wire in the charger's output cable is connected to the black wire from the control board means the Auxiliary contact in the plug is dirty, or the outside of the negative terminal in the cart's receptacle is dirty, of the battery sense wire in cable is intermittent.
Leaving it bypassed inside the charger is okay. Many chargers only use a two wire output cable and battery sensing is done inside the charger.

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Attachment five is a schematic on a series cart with the solenoid activation circuit highlighted.
The reed switch is located in the upper left corner and is labeled "Ignition Interlock"
When the magnet in the charge plug opens if, the cart is disabled.

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To attach things to posts, use the paper clip icon next to the Smiley face in the tool bar of the window you are typing text into.

[Rustnut]

Thanks so much for clearing this up for me.
The picture of the Charger you posted is the Unit I have.
I see now how I could mix the Two curcits together,The red wire on one side of the Plug is Not the same red wire on the other side of the plug.
EzGo could use a few more wire colors!
Below is a pic of the Beast. The paperclip did not appear on the quick reply (Post) page.
I'm learning so much and I really Thank You for that!

[JohnnieB]

I'm still leaning.
I just learned the Quick Reply window doesn't have the paper clip.
I've always hit either the Post Reply or Quote buttons, and never taken a close look at the Quick Reply window.