Ezgo txt series cart won't move...

Jgregory

Yesterday my cart would go forward but not in reverse. Checked micro switches and now cart won't move at all. Solenoid clicks when pedal pressed.
I won't lie I'm new to all of this. I have no idea where I should start to fix it.
I have the solenoid with the diodes... Not sure if I need to replace it?the micro switches click. I don't see any "burn" spots where contact points could have issues. Any help would be appreciated.
My cart is 36v with a 4hp motor.

BGW

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Jgregory

Just went out to work on it some more and now the solenoid won't click at all. I assume it's bad. I'll order another one and try that.

JohnnieB

The difference between forward and reverse in a TXT series drive, is which high current contacts are making contact in the F/R switch.

If the cart move normal in one direction, but not in the other, the problem is the high current contacts in the F/R switch are not making proper contact for the direction that is working right.

Makes sure the F/R lever rotates the movable cam all they away into the mechanical stops.


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Now that it doesn't move in either direction, but the solenoid still clicks, may be the center nut on the F/R switch assembly is too loose.

JohnnieB

This was posted while I was typing.
The solenoid no longer clicking is more likely due to a wire of microswitch that got damaged during poking and prodding than an actual solenoid failure.

Checkthe voltages on the highlighted wires on the attached schematic.

Attached Images

Wiring Diagram - Series with KSI traced.JPG (58.9 KB, 0 views)

Jgregory

Thanks for the help. So I replaced micro switches on f/r switch as well as solenoid. Now there is no clicking. Before the reverse buzzer would buzz, now that's not even buzzing.
Any ideas?

Sir Nuke

there is yet another micro switch to check....the one in the ITS (box under your floor board)

Jgregory

Going to check that one tomorrow when I get home from fire station.

scottyb

It's time to check the supply to these switches. Have you got a meter? can you check if you have a constant power supply to the F&R ms closest to the drivers side? There are red and blue wires on this switch, red is 36v positive all the time. This is the supply which may come from the charge receptacle or the battery main +

Jgregory

I don't have one but I have a friend that is going to help me with that.
I was going to run through everything to check power / voltages.
Where can I find out what voltages should be where ?????

scottyb

Each red line should 36v + at both ends with key on, in gear, pedal down

Attached Images

Ezgo Series solenoid activation diagram.jpg (107.9 KB, 0 views)