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The E-Z-GO golf cart has two kinds of speed controllers, the Precision Drive System, or PDS, and Drive Control System. The transition was made in 94 from the old to the new system. Both have a maintenance switch which should be flipped when servicing or troubleshooting. If your cart is having problems running at a constant normal speed or is performing erratically, then you should troubleshoot the controller to find out what the problem is.

Step 1

Switch cart to "Tow-maintenance" mode by flipping the switch under seat. Disconnect the black battery cable (negative) from the battery, open the cover to the speed controller and then reconnect the negative battery cable.

Step 2

Inspect all wires to ensure that they are attached and well connected, there are no breaks, corrosion or interference with the wires. Take the reading of the battery voltage by connecting the positive and negative probes to the battery. Write the voltage reading down.

Step 3

Test the solenoid to see if this is the problem. Place the positive probe on the solenoid post that is closest to the battery. The reading should be equal to battery's voltage. If not, there is a wiring issue in the solenoid. Connect the positive probe to the other post and take a reading. If the voltage is not at least three volts fewer than the voltage reading for the battery, the resistor must be replaced. If you have a volt reading equal to the battery volts, the solenoid is the issue.

Step 4

Check the power output from the controller by connecting the negative probe to the controller's M terminal and positive to the B+ terminal. Press the accelerator and watch to see if the voltage increases. It should increase from a reading of 0 to the full voltage of the battery. If the controller is putting out full battery voltage then, if there is a problem it is likely the motor has problems. BotXXX XXne is if the controller has full battery voltage output then the electrical system is performing like it should. That only leaves the possibility of the motor being the problem, if the cart will not reach top speed.

If you have any more questions I am here to help. Good luck, and Thanks for using Just Answer.

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Hi, I am a professional certified mechanic, with an engineering background, and 35+ years experience. I will do my best to assist you. At Just Answer the deposit you pay is not payment to the Expert, I only get paid if you click on accept, we receive no other pay. I don't know if you are a pro or a novice so we may have to fine tune the answer. I only know as much about your problem as you have told me in your post, so my answer will be based on what you have posted. Feel free to add any additional info you feel is needed. If you are satisfied with the answer, and feel you can leave a positive feedback please click on accept. I don't get paid unless you do.


There are higher speed motors you can install, they also require a higher amperage controller. Check out the link HERE for these high speed modification parts. If you have any more questions I am here to help. Good luck, and Thanks for using Just Answer.

I hope this helps, 100% satisfaction is my goal. Just Answer is here to serve you. If the answer is not clear, please let me know what additional help you need, and I will assist you further. When you're satisfied, click on the green accept button. I don't get paid unless you do. A bonus and positive feedback are always appreciated, good luck and Thanks.