Headlight Fails After Dark on a Rental Bike: Get Out of Traffic and Call the Shop

If a motorbike headlight stopped working at night on a Hanoi road, the first problem is not the bulb but the traffic around an unlit bike. Four official pages speak to that moment: Vietnam’s 2024 road traffic law on lights and on stopping with a fault, the UK Highway Code’s breakdown rules, and two Honda Vietnam owner’s manuals on headlight switches, bulbs, LEDs and fuses. Rental arrangements fall outside all four, as the closing section on gaps explains.

What Vietnam’s 2024 law says about lights after dark

The Law on Road Traffic Order and Safety, No. 36/2024/QH15, was passed by the National Assembly on 27 June 2024 and took effect on 1 January 2025, according to the full text posted on 9 September 2024 by the Nghe An Public Administration Service Centre. The law calls anyone operating a motor vehicle a driver, and its list of motor vehicles includes motorcycles and mopeds.

Article 20 requires drivers to switch on the front lights from 18:00 until 06:00 the next day, and also whenever fog, smoke, dust, rain or bad weather limits visibility. It also lists four situations in which drivers must switch from high beam to low beam:

• meeting pedestrians crossing the road;
• riding through populated areas with working street lighting;
• meeting oncoming vehicles, unless an anti-glare divider separates them;
• turning at a junction.

The article does not say what a rider should do if the lamp fails, and the law text read sets no penalty for breaking it.

Getting out of traffic

Article 18 of the same law covers stopping. On roads, a vehicle may stop only where there is a wide shoulder or land outside the carriageway; where the shoulder is narrow or missing, it must stop close to the right-hand edge. On streets, it must stop along the right-hand kerb with the nearest wheel no more than 0.25 metres away. If a technical fault forces a driver to park on part of the carriageway or where parking is not allowed, the law requires a signal with hazard lights or a warning sign placed behind the vehicle.

Britain’s Highway Code, published on GOV.UK, adds practical detail for a dark roadside. Rule 275 says to try to stop in a “place of relative safety”, where people and the vehicle are less likely to be at risk from moving traffic. Rule 276 says to get the vehicle off the road if possible, use hazard warning lights if it is causing an obstruction, wear reflective clothing at night, and keep sidelights on in the dark if possible. It also says not to stand between the vehicle and oncoming traffic, and at night not to stand where you block other road users’ view of your lights. Wider traffic advice sits in Motorbike Safety Tips for Hanoi Traffic.

Switch positions to rule out first

The two Honda manuals describe different light controls, so what to check depends on the model:

On the NSC110CBF, a headlight switch left at the tail-light or off position would leave the road ahead dark while the meter, which the manual says stays lit, still glows. That model’s manual also says its headlight dims while the idling stop system has stopped the engine at a standstill, so a dim lamp at a red light is described as part of that feature rather than a fault.

Bulbs, LEDs and fuses: what the manuals describe

The NSC110CBF manual gives a bulb replacement routine: turn the ignition to Off or Lock, let the bulb cool fully, use only the specified bulb type and check that the new bulb works before riding. For the headlight it runs to nine steps, including removing the dust covers, the mirrors, the front upper cover, screws and the headlight housing, and it says not to touch the bulb’s glass. The ACA manual takes a different line for its LED lights. The headlight, position light, brake and tail light, number-plate light and storage light use multiple LEDs, and if any LED does not light, the owner should contact an authorised Honda store.

On fuses, the NSC110CBF manual says they protect the bike’s circuits and that if an electrical part stops working, the owner should check for a blown fuse and replace it with one of the same rating. Fitting a higher rating can increase the chance of damaging the electrical system, and fuses that keep failing point to an electrical fault that an authorised Honda store should check. Both manuals add that any indicator that does not work as it should needs checking at an authorised store. None of these steps is written for a rider beside a dark road; whether a renter may open covers or change fuses is a question for the shop.

The light check before setting out

Both Honda manuals put lights and horn on the list of checks before every ride: check that the lights, indicators and horn work properly. On a trip that will end after 18:00, that list is the point at which a failed lamp would show before the law’s lighting hours begin. Both beams can be checked with the switches described above. For choosing a bike in the first place, see Motorbike Rental Hanoi: How to Choose the Right Bike.

What to tell the shop

A call is more useful with specifics. This list draws on the checks the manuals and the Highway Code describe:

1. Where the bike is. The Highway Code’s motorway section lists a mobile phone mapping application as one way to give a location.
2. Which lights still work: low beam, high beam, tail light, turn signals, meter lights.
3. The switch positions at the time, including the NSC110CBF headlight switch where fitted.
4. Whether the lamp died suddenly, flickered first or dimmed only at a stop.
5. Whether other electrical parts, such as the horn, stopped at the same moment, since the NSC110CBF manual links a part that stops working to a fuse check.
6. The model code if the manual is to hand.

Reflective gear is the kind of item covered in Motorbike Rental Hanoi: Recommended Motorcycle Accessories.

What the pages leave out

No page covers using a phone torch to be seen, carrying a spare bulb, or how long help might take. The switch pages of the two Honda manuals show no hazard-light switch, while Article 18 of the law names hazard lights or a warning sign; the pages do not say how a rider of these models meets that requirement. The law text sets lighting hours but gives no instruction for a lamp that fails on the road, and the pages read set no fine for riding without a working lamp. Rules 275 and 276 govern British roads; they appear here as general guidance, not as Vietnamese requirements. Model codes, not trade names, are all the Honda manuals give. Nothing in the pages covers a rental shop’s response, costs or who pays for a repair.

Sources checked

• Nghe An portal: Law 36/2024/QH15 full text
• GOV.UK: Highway Code, breakdowns and incidents
• Honda Vietnam: NSC110CBF owner’s manual
• Honda Vietnam: ACA160CAF and ACA125CAF/CBF owner’s manual

Thuê xe máy Nguyễn Hà is open 09:00–21:00 daily at Ngõ 5 Nguyễn Văn Cừ, Bồ Đề, Long Biên, Hà Nội (near Gia Lâm bus station). Phone: 0334 699 969.