What each colour means
These are the meanings set out in ISO 2575, the international standard for vehicle symbols, indicators and tell-tales. Clause 5.1 defines them in these words:
| Colour | What the standard says it means | What you do |
|---|---|---|
| Red | Danger to persons or very serious damage to equipment, immediate or imminent | Stop as soon as you can do it safely. Do not finish the trip first |
| Yellow or amber | Caution; outside normal operating limits, vehicle system malfunction, damage to vehicle likely, or other condition which can produce hazard in the longer term | Keep driving if the car feels normal, but get it looked at |
| Green | Safe, normal operating condition | Nothing is wrong. Something is switched on and working |
| Blue | Used for specific tell-tales — in practice, main beam | Dip your headlights when you meet oncoming traffic |
The colour is the urgency and the symbol is the detail. If you only remember one thing, remember that red is a reason to pull over and amber is a reason to book the car in.
Why the colour tells you more than the symbol
There are well over a hundred standardised dashboard symbols, and no driver knows all of them. You do not have to. The colour carries the urgency, and the urgency is the decision you actually have to make at the wheel.
A symbol you have never seen before, glowing red, means the same thing as any other red light: something is wrong now, and continuing could hurt someone or wreck the car. A symbol you have never seen before in amber means find out what it is this week.
That is the whole system, and it is deliberate. ISO 2575 is what makes the symbols look broadly the same across a Toyota, a VW and a Hino, so the convention holds whatever you are driving.
The lights that most often come on
Red, and worth stopping for: oil pressure, engine temperature, the brake system warning, and the battery or charging light. Oil pressure and temperature in particular can turn an expensive problem into a destroyed engine within a few kilometres.
Amber, and worth booking in: the engine management light, ABS, tyre pressure, and most emission or sensor faults. The car will usually drive normally. A flashing engine light is the exception to treat as urgent rather than routine.
Green or blue, and not a fault at all: indicators, headlights, main beam, cruise control, fog lamps. A learner seeing a green light for the first time and assuming something has broken is extremely common and entirely harmless.
The one rule that survives whatever the symbol is
When you start the car, most tell-tales light up briefly as the vehicle checks itself, then go out. That is normal and it is how you know the bulbs work.
What is not normal is a light that is still on after the engine is running. That is the moment worth noticing, and the safe response is always the same: find out what it is before you drive, rather than after.
The mistake
Treating every light as equally serious, or none of them as serious. Both end badly — the first leaves you stranded over an indicator bulb, the second lets an oil pressure light run for twenty kilometres.
The other one is the handbrake. The brake warning light comes on when the handbrake is up, so a red brake light that goes out when you release it is the system working, not a fault. A red brake light with the handbrake fully down is not.
Is this on the learner's test?
Barely, and it is worth being straight about that rather than selling you study time you do not need.
The learner's test examines the rules of the road, road signs, and the controls of the vehicle class you applied for. The Department of Transport's own learner-driver manual sets out eleven controls for a car, and dashboard warning lights are not among them. Across the real exam items we have catalogued, every question involving the colour amber turned out to be about a road sign or a traffic signal rather than a dashboard light.
What can come up is the behaviour rather than the colour code: a warning light that stays on after starting is something you check before moving off. That is the answer to look for.
This page is here because it is a question people genuinely need answered while driving — not because it will be on the paper.
Spend your study time where the marks are
Vehicle controls is the shortest of the three sections and the least forgiving, but it is about the controls you operate, not the dashboard. The free readiness test scores the three sections separately so you can see which one actually needs the work.
Take the free readiness testCommon questions
What does a red dashboard warning light mean?
Danger to people or very serious damage to the vehicle, immediate or imminent. Stop as soon as you can do so safely rather than completing the journey.
What does an amber or yellow warning light mean?
Caution. Something is outside normal operating limits or a system has a fault, and damage is likely or a hazard could develop over time. You can usually keep driving, but have it checked.
Are green dashboard lights a problem?
No. Green means a safe, normal operating condition — a system is simply switched on. Indicators, headlights and cruise control all show green.
Can I keep driving with the engine light on?
If it is a steady amber light and the car drives normally, usually yes, but book it in. A flashing engine light indicates a fault happening right now and should be treated as urgent.
Why does my brake warning light come on?
Most often because the handbrake is still up. If it goes out when you release the handbrake, that is the system working correctly. A brake light that stays on with the handbrake down needs attention before you drive.
Are dashboard warning lights on the K53 learner's test?
Hardly. They are not among the eleven car controls the Department of Transport's learner-driver manual sets out, and we have not found a dashboard tell-tale in the real exam items we have catalogued. What can be asked is the behaviour — a light still on after starting is something you check before driving off.
Sources
- ISO 2575:2021 — Road vehicles: symbols for controls, indicators and tell-tales, clause 5.1"When used on optical indicators or tell-tales, the following colours have the meanings indicated: — red: danger to persons or very serious damage to equipment, immediate or imminent; — yellow or amber: caution, outside normal operating limits, vehicle system malfunction, damage to vehicle likely, or other condition which can produce hazard in the longer term; — green: safe, normal operating condition (where blue or yellow is not required)." This is an INTERNATIONAL STANDARD, not South African law — see the note below.
- UN ECE Regulation 121The regulation on identification of controls, tell-tales and indicators, through which the ISO 2575 symbols reach vehicle type approval.
- South African Learner Driver Manual, Department of Transport (v1.00, June 2012), section 3Vehicle Components and Controls. It sets out eleven controls for a car and dashboard warning lights are not among them — the basis for saying this topic is barely examined.
- A note on what South African law does and does not sayThe National Road Traffic Regulations do not define what a dashboard colour means. The only place "warning light" appears in the consolidated regulations is reg 181(1)(a), an anti-lock brake warning light on the front of a trailer — an exterior lamp. The in-cab warning devices the regulations do require are reg 156(2), a visible or audible warning of incorrect air or vacuum pressure on air-braked vehicles, and reg 215(1), a speedometer. The colour convention on this page is the international standard, and is described as such.
Last updated 2026-09-21.