Why Won’t My Golf Cart Move Even With Charged Batteries?

If your golf cart batteries are charged but the cart won’t move, common causes include corroded terminals, faulty solenoids, motor issues, or controller malfunctions. Diagnose connections, test voltage drops, and inspect components systematically. Always prioritize safety by disconnecting power before troubleshooting.

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What Role Does the Solenoid Play in Golf Cart Operation?

The solenoid acts as a high-current switch between batteries and motor. A faulty solenoid prevents power transfer even with charged batteries. Test by listening for a “click” when pressing the accelerator. No click suggests solenoid failure. Measure continuity across terminals; infinite resistance means replacement is required.

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Modern golf carts use two types of solenoids: continuous-duty and intermittent-duty. Continuous solenoids (common in older models) maintain constant contact, while intermittent versions activate only during acceleration. To diagnose, measure voltage on both sides of the solenoid coil when the pedal is pressed. A 12V-48V reading (depending on cart voltage) without engagement indicates a stuck plunger or burnt coil. For carts with multiple solenoids (like some Club Car models), test each one individually. Upgrading to heavy-duty solenoids improves reliability in hilly terrain. Always match replacement solenoids to your cart’s voltage and ampacity requirements—using undersized units causes premature failure.

How Does the Controller Impact Golf Cart Movement?

The controller regulates power from batteries to motor. Faulty controllers show no response to throttle input. Use diagnostic tools specific to your cart model (e.g., Curtis 1313-4401) to read error codes. Burnt MOSFETs or swollen capacitors require professional repair or controller replacement.

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Controllers use pulse-width modulation (PWM) to control motor speed. A failing controller may exhibit “cogging” (jerky movement) or complete shutdown. For Curtis controllers, flashing LED codes help identify faults—two red flashes indicate throttle sensor issues. Alltrax controllers provide Bluetooth diagnostics via mobile apps. Thermal paste degradation between heat sinks and power transistors is a common failure point in humid climates. When upgrading controllers, ensure compatibility with motor type (series-wound vs. PMAC). High-performance controllers require upgraded wiring and solenoid to handle increased current. Always reset controller programming after battery replacements to prevent voltage mismatch errors.

“In 80% of ‘no movement’ cases with charged batteries, the issue lies in the solenoid or controller. Always test the solenoid first—it’s the gateway between power storage and motion. For modern carts, don’t overlook OBC (On-Board Computer) faults that can disable the drive system despite good battery voltage.”
– Redway Power Systems Engineer

FAQ

How often should I replace golf cart batteries?

Lead-acid batteries last 4-6 years with proper maintenance. Lithium batteries extend to 8-10 years. Replace when capacity drops below 70% of original rating.

Can I reset my golf cart’s controller?

Some controllers have reset procedures (e.g., turning key on/off 5 times). Consult your manual. Resetting often clears error codes but doesn’t fix hardware failures.

What’s the average cost to repair a non-moving golf cart?

Solenoid replacement: $50-$150. Controller rebuild: $200-$600. Motor overhaul: $300-$800. Labor adds $75-$150/hour depending on shop rates.