Bad Golf Cart Solenoid Symptoms: Test & Replacement

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A click with no movement can involve a solenoid, battery, cable, throttle input or controller fault. On a gas cart, separate “will not crank” from “cranks but will not start.” Replacing a solenoid because it clicks can leave the original fault untouched.

This guide explains the measurement distinctions and replacement information to collect. It does not supply a universal pedal-operated live test: controller wiring, interlocks, coil control and safe test setup differ by cart.

Start with the symptom and the exact system

Observation	What it establishes	What to ask a technician to distinguish
Electric cart clicks but does not move	A switching sound occurred; usable power is not established	Battery performance under load, power-path connections, contact closure and controller/throttle operation
Rapid clicking or buzzing	Engagement is unstable	Coil supply/control, battery sag, wiring and contactor suitability
No click	No audible engagement	Missing command, interlocks, wiring or an open/failed coil
Burnt smell, melting or discolored cable ends	Visible damage needs attention	Resistance at connections, damaged cable/lugs, contact condition and excessive load
Gas cart clicks but does not crank	The engine is not being turned by the starting system	Starting battery, cables, solenoid and starter-generator circuit
Gas cart cranks but does not start	The engine turns	Fuel, ignition and engine diagnosis rather than a solenoid-only assumption

Stop using a cart with smoke, melted wiring or a burnt connection and arrange service. Do not touch a terminal to judge its temperature. Record when an intermittent fault occurs—after charging, at launch, after a stop or after warm operation—without deliberately repeating a damaging condition.

Gather the cart's serial number, model/year, gas or electric configuration, battery type, controller identification, fault codes and any modifications. The troubleshooting guide covers adjacent faults; the starter-generator guide covers gas starting and charging.

Two voltage measurements that must not be confused

A meter reading needs named probe references, contact state and load conditions.

Supply or output voltage: a large power terminal measured relative to the specified battery-negative reference describes the voltage at that point. A technician compares battery-side and downstream readings under the manual's commanded conditions. Measuring at rest alone does not establish the ability to carry drive or cranking current.

Contact voltage drop: a meter across the two large main terminals measures the difference between them. A healthy closed contact has a small drop while carrying current; it should not show the whole pack voltage merely because it has closed. Open-contact readings can be affected by the surrounding circuit, including precharge components. They are not a universal pass/fail test.

For one concrete specification, the Alltrax 200A main-solenoid datasheet lists 80 mV voltage drop per 100 A. That is a manufacturer specification for that contactor, not a threshold for every stock solenoid.

A worked calculation, not a cart test

At the datasheet's stated 100 A point, 80 mV is 0.080 V. The corresponding calculation is:

• Resistance: 0.080 V ÷ 100 A = 0.0008 ohm, or 0.8 milliohm.
• Contact dissipation: 0.080 V × 100 A = 8 W.

This explains why a small voltage difference can matter in a high-current circuit. These are calculations from a published specification, not measurements on a GolfCartSearch cart. They do not set an allowable temperature or identify the cause of a reader's fault.

What a safe diagnostic plan needs

Before energized diagnosis, the technician needs the exact cart/controller service instructions for vehicle restraint and wheel support, run/tow state, interlock behavior, permitted probe locations and required command. A test that needs the drive command may be disabled in tow mode; a state used for installation is not automatically the state used for live diagnosis.

Alltrax's SR troubleshooting guide, dated August 15, 2019, specifically calls for rear wheels raised during its tests and battery power disconnected when installing or removing components. Its fault branches include load-testing batteries, inspecting connections, and checking diode polarity or precharge hardware where that SR system uses them. This does not establish the setup for an RXV, a different controller or a gas starter circuit.

Ask the shop to report the battery/load result, coil-command result, contact-drop result and downstream diagnosis, with reference points and conditions. Working headlights do not prove that a gas starting battery can supply cranking current. A click does not prove that main contacts carry current.

Do not bridge the power terminals or bypass an interlock as an owner shortcut. A bypass can energize the drivetrain and remove control protections; it also does not replace the system-specific diagnosis. Cable removal, tightening, diode work and cleaning require the manufacturer's isolation, discharge, torque and reassembly instructions.

A public repair account: repeated replacement is a clue

In an October 2–8, 2022 Cartaholics thread, contributor johnv410 reported working on a friend's 1999 EZGO TXT gas cart. The contributor described repeated aftermarket-solenoid failures, reported 14.6 V at the battery during the discussion, and later reported a different result after obtaining a dealer solenoid. A forum follow-up described the problem as solved.

That is an attributed repair report, not our diagnosis or a controlled comparison of suppliers. It does not provide independent confirmation of failed parts, test conditions or long-term durability. Do not use its 14.6 V reading as a charging-voltage limit for another cart, or copy the bypass method mentioned in the thread.

The useful buying lesson is to verify the exact replacement and investigate repeat failures. The report does not establish that all aftermarket solenoids fail or that changing suppliers cures every repeated fault.

Match the coil and main contacts separately

Pack voltage alone is not enough to order a contactor. The Alltrax datasheet lists 24 V, 36 V and 48 V coil versions, while all three list a 48 V DC contact-circuit rating. The coil-control requirement and the circuit switched by the main contacts are separate specifications.

Before ordering, confirm:

1. The OEM part number or the controller manufacturer's approved contactor.
2. Required coil voltage and control method, including any pulsed control.
3. Main-contact DC voltage, continuous-current duty and interruption requirements.
4. Required diode, precharge resistor, polarity and wiring arrangement.
5. Terminal/bracket layout, cable clearance and installation torque.

An advertised “36 V” or “48 V” label can refer to a coil rather than the complete application. Do not infer an RXV coil requirement from its traction-pack label or transfer a TXT kit to it. If an upgraded controller is fitted, obtain its approved contactor requirement before buying a stock-style replacement.

Replacement cost: get a diagnosis-inclusive quote

An installed price should itemize diagnosis, the identified part, labor, any cables or supporting components, tax and warranty. A retail part price does not establish the total repair cost.

Ask whether diagnosis is credited toward repair and whether cable or controller damage could change the quote. For an intermittent problem, include the conditions you observed so the shop can plan the work. Find a local electric-cart repair service or dealer that supports the exact system.

Common questions

Can a solenoid click and still fail?

Yes. Audible engagement does not establish low-resistance main-contact conduction. Batteries, wiring and downstream faults can also produce a click without movement.

Is no click proof of a bad solenoid?

No. The control command or supply may be absent, an interlock may be active, wiring may be faulty, or the coil may have failed. The exact circuit determines how those possibilities are separated.

Is replacement a simple DIY job?

Decide from the model-specific service procedure and confirmed diagnosis, not the apparent number of nuts and wires. If the isolation/discharge sequence, wiring, torque or live-test setup is unavailable, have the correct part identified and installed by a shop. Repeated failures, modifications or damaged wiring need a diagnosis before another replacement.