Another Golfcart question?

Robert in Md · Jan 3, 2017

I've got a 1993 Easygo cart, 36 volt that works fine when its above 45 degrees but

colder it goes to full speed when the peddle it pushed. This makes the cart

dangerous to operate, with grandkids around. I want to correct the problem but

don't know where to start. Can anyone help Robert in Md.

Geo-TH,In · Jan 4, 2017

My mom had a 70's easy go. The speed control was a large wire variable resistor.

Yours may use 36 volt solenoids to short out resistors to go faster. You will find them under the seat, mounted towards the back in a row. It's possible one or more of those solenoids need replaces. At high speed, the last solenoid puts full power, 36v to motor. Also possible you have an open resistors or a bad connection where they fasten to solenoid or both. If I recall all the resistors are in series. I gave you where to look, good luck trouble shooting.

If you have solenoids, put rear wheels on jack stands and push on peddle. You should hear the solenoids click. A little rusty on the order they pick up. I'm thinking the one on driver's side is the first to pick up when you turn the key on or step on peddle, then the others pick up one at a time. If nothing else, put your hand on the and you can feel when they pull in.

Then newer models went to an electronic brain box controller and that exceeds my pay grade. seek profession help.

GarryinNC · Jan 4, 2017

EZGO only used one solenoid and used a 'wiper board' with carbon/metallic contacts. Each contact is connected to a different part of the resistor coil. The newer models have an electronic speed controller. Cannot remember when they changed to the electronic. I have one each of the old and newer style. Trying to think what would cause yours to do what it is doing.

Garry

504 · Jan 4, 2017

These guys know all you ever wanted to know, if you can find it.
Untitled URL Link

Geo-TH,In · Jan 4, 2017

Robert, I stand corrected. After googling circuit diagram for electric golf carts, I discovered I told you about a club car not an ez go.

you can google circuit diagrams for golf carts. Hope that is helpful

Robert in Md · Jan 4, 2017

This cart has been updated to the electronic controller years ago and a new controller was

installed about 2 years ago. I don,t understand how the temperature causes this problem

Geo-TH,In · Jan 5, 2017

seek professional help. No experience with controllers, above my pay grade.

I do know the output of a battery is temperature related. Only guessing here, cold temperatures cause metal to contract. Gas peddle has to have some kind of variable resistor. Is is it possible there is something defective with the gas peddle?

I'm glad I don't have to trouble shoot your problem. Good luck,
I have a cheap heat gun from HF. It puts out 1100 F. Try warming up the control on gas peddle and brain box. See if that fixes your problem. Test with rear wheels off the ground. Then use a IR thermometer so you don't over heat things.

GOOD LUCK, GEO

Geo-TH,In · Jan 5, 2017

Robert,
Recently the electron brake controller on my truck flashed two codes, Overload and Short Circuit. I took controller apart, checked wiring, couldn't find a problem. Now it seems to be OK. It has had a few hiccups in the past, they seem to go away.

You think your problem is temperature related. Well with change in temp you will also have change in relative humidity. Is it possible condensation is your problem. The two days my controller was acting up it was raining.

So heat applying heat will dry things out. Use a hair dryer and let me know what happens. I plan to do the same if my electronic brake controller flashes codes again.geo

Another Golfcart question?

Robert in Md

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