Golf buggy charger clicks but won't charge
Written by the Hawke Electric Vehicles Service Team
Quick answer
A golf buggy charger that clicks once, or cycles click-clack, and then does nothing has almost always detected the pack, tried to connect and immediately backed off. The usual reasons are a pack voltage sitting right on the charger's handshake threshold, one failed battery collapsing under the first current, or a poor connection at the receptacle. Start by measuring the whole pack, then each battery in turn, at the terminals.
Tools needed
- Digital multimeter
- Safety glasses
- Insulated gloves
- Work light
Confirm the symptom
This guide is for a charger that gives a relay click, a single clack, or a repeating click-clack, and then delivers no charge: the ammeter or charge light never settles into a steady charging state and the pack voltage does not climb. The click matters, because it tells you the charger has mains power and is trying to connect to the pack. That already rules out a dead socket and a blown mains fuse, which are the faults behind a charger that stays completely silent.
If your charger is silent with no click, no fan and no lights, you are on the wrong guide; read Golf buggy not charging instead. If the charger shows no lights at all even on a socket you know works and with the buggy unplugged, the fault is on the supply side of the charger; see Golf buggy charger not working. If the charger runs steadily and the pack does charge, but the batteries then run down quickly, the pack is accepting charge and the guide you want is Golf buggy battery draining fast.
1Listen to the click pattern
Plug the charger into a socket you know works, connect it to the buggy and listen. Note whether you hear one click then silence, or a click-clack that repeats every few seconds.
ExpectedOne click then silence usually means the charger connected and backed off once; a click-clack that repeats means it is trying and aborting over and over, which points to a pack it cannot bring up
2Watch the pack voltage as it clicks
Set a multimeter to DC volts, read across the pack's outermost terminals, then connect the charger and watch the number through the click.
ExpectedA charging pack rises and holds; a reading that jumps up on the click and then sags straight back points to a pack, or one battery in it, that collapses the moment current flows
What causes it
| Cause | How common | How to confirm | Fix |
|---|---|---|---|
| Pack voltage on the edge of the charger's handshake threshold | very common | Measure the whole pack at the terminals and compare with the charger's wake range | How to test golf buggy batteries with a multimeter |
| One failed battery collapsing under the first current | very common | Measure each battery in turn; one reads far below its siblings | How to test golf buggy batteries with a multimeter |
| Worn receptacle or a poor connection at the plug | common | Compare voltage at the receptacle pins with voltage at the pack terminals | |
| Charger retrying on its own protection (heat or fault sense) | common | Read the charger's error light pattern; let it cool and retry | |
| Club Car OBC not completing the handshake | occasional | Reset the OBC; the same charger works on another vehicle | |
| Failing charger output stage | occasional | Rule out the above, then try the charger on a known-good vehicle |
Pack voltage on the edge of the handshake threshold
An automatic buggy charger checks battery voltage before it closes its output relay, and the click you hear is that relay pulling in. If the pack sits right at the bottom of the voltage the charger needs to see, the charger connects, finds the voltage sagging under the first trickle of current, decides the handshake has failed and drops out again. The wake range varies by charger family: many 36 volt chargers want to see somewhere above roughly 20 to 28 volts, and many 48 volt chargers somewhere above roughly 28 to 38 volts. Treat those as working ranges and check the label or manual for the exact figure.
3Measure the whole pack at the terminals
With the charger unplugged, set the meter to DC volts and read across the pack, most positive terminal to most negative.
ExpectedA healthy rested 36 V pack reads about 38.2 V, and a 48 V pack about 50.9 V. A pack sitting only a little above the wake range, or below it, is the likely reason the charger connects and then lets go
If the whole pack is merely flat rather than faulty, you can lift it back over the threshold: charge each battery individually with a small charger of the matching voltage, supervised and in a ventilated space, until the pack total is comfortably clear of the handshake range, then let the buggy's own charger take over. Check the electrolyte covers the plates in every cell before any recovery charge and top up with distilled water where it does not.
One failed battery collapsing under the first current
A single dead battery is one of the most common reasons a charger clicks and quits, and it is easy to miss if you only measure the whole pack. Rested, the pack total can look almost normal, because a failed battery still shows a voltage sitting still. Put the smallest current through it, though, and that battery's voltage collapses, dragging the pack below the handshake point and forcing the charger to drop out, which is exactly what a repeating click-clack describes.
4Measure each battery in the pack
Read across the posts of every battery in turn and write the values down in order, so you can compare them like for like.
ExpectedRested and full, a 6 V battery reads 6.3 to 6.4 V, an 8 V battery 8.4 to 8.5 V and a 12 V battery 12.6 to 12.7 V. One battery a volt or more below its neighbours is the unit dragging the pack down
A rested reading only narrows it down; the definitive test is to read each battery again while the pack is under load, because the weak one sags hardest when it is working. The guide Finding the one bad battery in a pack walks through that under-load comparison. A battery that fails it has reached the end of its life and needs replacing.
A worn receptacle or a poor connection at the plug
The charge plug and the receptacle on the buggy carry the full charging current, so a worn contact, a bent pin or a plug that wobbles in its socket can drop enough voltage to break the handshake even when the pack is healthy. The charger senses a good pack, closes its relay, then sees its output voltage collapse across the bad joint and drops out, giving the same click-clack.
5Compare receptacle voltage with pack voltage
With the charger unplugged from the mains, read the DC voltage across the pins inside the buggy's receptacle, then read across the pack terminals.
ExpectedThe two should match within about 0.1 to 0.2 V. A healthy pack at the terminals but a low or missing reading at the receptacle pins means a break in the receptacle wiring, its fuse where fitted, or the receptacle itself
Inspect the pins and contacts for pitting, discolouration or melted plastic while you are there. The charging port faults guide covers cleaning and replacement in detail.
The charger retrying on its own protection
Chargers cycle their relay on purpose when their internal protection trips. A charger that has overheated, or that senses an out-of-range voltage, will close its relay to test the pack, back off, wait and try again, which reads as a slow click-clack. Many chargers show this on an error light, so read the pattern against the label or manual first.
6Let the charger cool and read the error light
Unplug the charger, leave it somewhere cool and ventilated for half an hour, then plug in again and note any flashing pattern on its indicator.
ExpectedNormal charging resumes after cooling: the charger was heat-protecting. A repeating fault pattern that survives cooling points to a charger fault or a pack the charger has judged out of range
If the charger only misbehaves when it is hot, improve the airflow around it and keep it off carpet and out of direct sun. A charger showing the same fault cold has a genuine problem to run down.
Charge control faults on Club Car models
On Club Car buggies with an onboard computer, the OBC sits in the charge circuit and completes it only when it is satisfied, so a marginal OBC can let the relay click and then refuse to hold the connection. A widely used reset is to turn the Tow/Run switch to Tow, disconnect the main negative battery cable for a few minutes, reconnect it, switch back to Run and plug the charger in again.
If the reset makes no difference and the same charger holds a steady charge on another vehicle, the OBC, its wiring or the relay it drives is the likely fault, a job for an engineer with the right diagnostics.
A failing charger output stage
A charger whose output stage is on the way out can detect the pack and click its relay but fail to deliver steady current, so this cause looks like the pack faults above. It sits low in the list because a pack fault is far more common, and the clean way to separate the two is a swap.
7Try the charger on a known-good vehicle
Connect the suspect charger to another buggy of the same pack voltage and plug type whose batteries are known to be healthy.
ExpectedThe charger settles into a steady charge on the good vehicle: your charger is fine and the fault is your pack or receptacle. It click-clacks on both: the charger is the problem
Leave the case closed whatever the result. Charger capacitors hold enough energy to give a serious shock long after the mains lead is pulled, and internal repair is engineer work.
When to book an engineer
Book an engineer if the per-battery readings show one unit collapsing and you would rather have the pack tested and replaced properly, if the receptacle contacts are burned, if a Club Car OBC reset does not restore a steady charge, or if the swap test points at the charger. Each of these is a quick diagnosis with the right equipment, and replacing parts on a hunch, a new battery here, a new charger there, is the slow and expensive way to the same answer.
Common questions
Why does my charger click once and then stop?
The charger detected the pack, closed its relay to start charging, then found the voltage sagging under the first current and dropped out. That usually means the pack is on the edge of the charger's handshake voltage or one battery is collapsing. Measure the whole pack, then each battery, at the terminals.
Can one bad battery stop the whole pack from charging?
Yes. A single failed battery can read almost normally at rest but collapse the instant current flows, pulling the pack below the voltage the charger needs and forcing it to abort. Find it by reading each battery under load, covered in the guide on finding the one bad battery in a pack.
What voltage should the pack be for the charger to hold?
It varies by charger family: many 36 V chargers want the pack above roughly 20 to 28 V, and many 48 V chargers above roughly 28 to 38 V, with the exact figure on the label or in the manual. A healthy rested pack reads about 38.2 V on a 36 V system and about 50.9 V on a 48 V system, well clear of the handshake range.
Is it safe to keep plugging it in while it clicks?
A few attempts to confirm the pattern are fine, but do not leave it cycling for hours. If the charger click-clacks continuously it has judged something out of range, and repeated hard connections do the pack and the receptacle no good. Diagnose the cause rather than letting it retry.
How do I tell whether it is the charger or the pack?
Swap test it. Connect your charger to another buggy of the same voltage with known-good batteries: if it settles into a steady charge there, your charger is fine and the fault is your pack or receptacle; if it click-clacks on both, the charger is at fault.
Can I recover a pack that is just flat?
Often, yes. Charge each battery individually with a small charger of the matching voltage, supervised and ventilated, until the pack total clears the charger's handshake range, then let the buggy charger finish. If one battery will not come up or falls straight back, it has failed and recovery will not hold it.
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