If you are experiencing problems with your golf cart motor, you may need to replace the voltage regulator. A faulty voltage regulator can lead to many problems, including an overcharge which can burn out numerous electrical components or having a golf cart battery that will not hold a charge at all. Replacing the voltage regulator can be done in a few steps.
Step 1 - Preparation
For the sake of safety, always wear your safety glasses and work gloves.
Step 2 - Disconnect the Battery and Charger
To begin, you must first disconnect the battery and charger to avoid any electrical shock. To do this, find and open the battery hatch cover, which is usually located under the seat or under the front hood. Use your wrench to loosen and remove the negative cable from the battery that is directly connected to the battery charging circuit. Once this is done, you can remove the positive cable in the same way that you removed the negative cable. Having them all disconnected, you may then remove the battery.
Step 3 - Disconnect and Remove Regulator
Disconnect your regulator so that you can remove it. Some regulators will bolt into the golf cart and some will latch onto it depending on make and model, so remove it once you have it disconnected with the appropriate tool after determining which you are dealing with. This might be a good idea to do prior to purchasing your new regulator to ensure the one that you are buying is compatible.
Step 4 - Install New Regulator
Once you have your old regulator out, it's time to put the new one in. Attach the bolts or latches as needed for the new regulator using the appropriate tool.
Step 5 - Checking Voltage Output
It's time to use your voltage meter. Connect the meter to the battery poles and then start your engine whilst being careful not to spin. You want the voltage to read over 12.6. Now slowly increase your engine speed. You should find that your voltage increases until you hit around a thousand revolutions per minute (RPM). From that point, the reading will stay in one place. This should be 13. volts, though it is fine if it remains in the spectrum of .5 volts higher or lower than this.
Step 6 - Checking Electrolyte Levels
It is a good idea to check the electrolyte levels in the battery to make certain that it is functioning correctly. If this is low, you can use distilled water to bring them up to the required level, which is just under the neck when looking into the cell.