Turn signals on Nissan Sunny: how to check, replace and troubleshoot

Nissan Sunny (especially models B14 And B15) is a legendary car, but even it has problems with turn signals over time. Is it flashing too quickly, not working at all, or is it on without flashing? In 80% of cases, light bulbs, relays or oxidized contacts are to blame - and all this can be repaired yourself without a service station.

In this article we will analyze all possible turn signal malfunctions on Sunny, from the banal burnout of lamps to problems with electrical wiring. You will find out where it is turn relayhow to check fuse, and why sometimes only one side blinks. And also - step-by-step instructions with photos and connection diagrams.

Causes of malfunctioning turn signals on Nissan Sunny

If the turn signals are on your Sunny started to behave strangely, first of all, determine symptom:

• 🔴 Don't blink at all - the problem is in the lamps, fuse or relay.
• 🟡 Flashing too fast — one lamp has burned out or there is a short circuit.
• 🟢 Constantly lit without blinking - the relay is faulty or there is an open circuit.
• 🔵 Works on one side only — oxidation of contacts or wire breakage.

The most common reason is burnt out lamps (especially in the rear lights, where moisture quickly destroys the contacts). In second place - turn relay, which over time “gets tired” and begins to fail. Fuses are less likely to blame (10A or 15A, depending on the year of manufacture) or wiring breaks.

Important: on the Nissan Sunny B15, the turn relay is combined with the emergency lights - if one does not work, check the other. Also note mass (often oxidizes under headlights) and connectors in the fuse block.

Where is the turn signal relay and fuse located?

Depending on model Sunny, the location of the relays and fuses may differ:

Model	Turn relay	fuse	Fuse rating
Nissan Sunny B14 (1995–2000)	Under the instrument panel, to the left of the steering wheel (gray block)	Fuse box position #17	10A
Nissan Sunny B15 (2000–2006)	In the relay box under the hood (black box next to the battery)	Fuse box in the passenger compartment, position #23	15A
Nissan Almera N16 (similar to Sunny)	Behind the glove compartment, on the additional panel	Fuse box position #10	10A

To get to the relay on B14, remove the plastic cover under the steering wheel (unscrew 2 screws). On B15 easier - open the hood and find the black relay block next to the battery. The fuse is usually labeled as "TURN" or "SIGNAL".

⚠️ Attention: On some versions Sunny The turn relay is combined with an alarm relay. If after replacing the relay the hazard lights work but the turn signals do not, check switch under the steering wheel (contacts often oxidize).

How to check turn signal lamps

Start with the simplest thing - checking the lamps. On Nissan Sunny there are only 4 of them:

• 💡 Front left (in the headlight).
• 💡 Front right (in the headlight).
• 💡 Rear left (in the rear light).
• 💡 Rear right (in the rear light).

To get to the front lamp:

1. Open the hood.
2. Remove the protective rubber cover from the back of the headlamp.
3. Turn the lamp socket counterclockwise and remove it.
4. Replace the lamp with a new one (PY21W for turn signals).

For rear lamps:

1. Open the trunk.
2. Remove the trim from the side of the non-working lamp (unscrew the 2 plastic clips).
3. Pull out the lamp socket and replace it.

Turn off the ignition|Check all 4 lamps visually|Replace the burnt ones with PY21W|Check the socket contacts for oxidation-->

Advice: If the lamp is intact, but the contacts in the socket are oxidized, clean them with sandpaper or wipe with alcohol. This often solves the problem of a “blinking” turn signal.

Turn signal relay diagnostics

If the lamps are intact, but the turn signals do not work, the relay is to blame. You can check it in two ways:

Method 1. Replace with a known working one.

Change the turn signal relay with the hazard warning light relay (they are the same on Sunny B14/B15). If the turn signals work, buy a new relay. If not, the problem is in the wiring or switch.

Method 2: Testing with a multimeter.

Remove the relay and check it:

1. Set the multimeter to resistance test mode (200 Ohm).
2. Connect the probes to the contacts 85 And 86 (relay coil). There must be resistance 70–90 Ohm.
3. Connect 12V to contacts 85 And 86 - there should be a clicking sound.
4. Check your contacts 30 And 87 in a closed state - the resistance should be 0 ohm.

If the relay does not click or the resistance is different, it is faulty. Cost of a new relay for Sunny - from 300 to 800 rubles (original Nissan 25230-4M000).

How to distinguish an original relay from a fake?

Original relay Nissan 25230-4M000 has:

- Clearly marked with the Nissan logo.

- Matte plastic, without burrs.

- Contacts made of brass (not aluminum).

- Weight ~50 grams (fakes are lighter).

Problems with wiring and ground

If the lamps and relays are working, but the turn signals still do not work, look for a break or poor contact. On Nissan Sunny most often suffer:

• 🔌 Weight under headlights (oxidized by moisture).
• 🔌 Connectors in the fuse box (especially after a “makeshift” renovation).
• 🔌 Wires from the switch under the steering wheel (fray over time).

How to check:

1. Disconnect the negative terminal of the battery.
2. Remove the plastic trim under the steering wheel (unscrew the 3 screws).
3. Check the turn switch connector for oxidation or broken wires.
4. Test the circuit from the switch to the lamps with a multimeter (the resistance should be close to 0 ohm).

Pay special attention mass - on Sunny it is often attached under the headlights to the body. Clean the mounting area from rust and lubricate Lithol.

⚠️ Attention: If the fuse trips when the turn signal is turned on, there is a short circuit in the circuit. Do not install a fuse of a higher rating! Look for the short circuit (most often in the rear lights, where the wires rub against the body).

Replacing the turn signal switch

If all the previous steps did not help, the problem is steering column switch. On Nissan Sunny it often breaks due to:

• 🔧 Wear of contacts (they burn over time).
• 🔧 Moisture ingress (if you previously filled the windshield carelessly).
• 🔧 Mechanical wear (the lever begins to “hang out”).

Replacing the switch with Sunny B14/B15 takes ~30 minutes:

1. Remove the negative terminal of the battery.
2. Unscrew the 2 screws securing the lower part of the steering column.
3. Remove the plastic covers (carefully so as not to break the clips!).
4. Disconnect the switch connector (press the latch).
5. Unscrew the 2 bolts securing the switch and remove it.
6. Install a new switch (Nissan 25540-4M000 for B14, 25540-6M000 for B15).

The cost of a new switch is from 1,500 to 3,000 rubles. Before purchasing, check the VIN of your vehicle!

Frequently asked questions about Nissan Sunny turn signals

❓ Why do the turn signals flash too quickly?

This means that in the circuit resistance decreased. Most often, a burnt-out lamp (one of four) is to blame. Less commonly, a short circuit in the wiring or a faulty relay. Check all lamps and contacts!

❓ Is it possible to drive if the turn signals do not work?

Technically possible, but this is a traffic violation (fine 500 rubles according to Part 1 of Art. 12.20 Code of Administrative Offenses). In addition, it is dangerous - other drivers will not understand your maneuvers. Workaround: Use hand for signals (like on a bicycle).

❓ Which fuse is responsible for the turn signals on the Sunny B15?

On Nissan Sunny B15 The fuse is responsible for the turn signals #23 face value 15A (in the salon block). Also check the hazard warning light fuse (#24), since the chains are connected.

❓ Why does the light come on when you turn on the turn signal, but does not blink?

This is a sign faulty relay or a break in the circuit. The relay cannot "open" the circuit, so the lamp is constantly on. Replace the relay or check the wiring from the relay to the lamps.

❓ Is it possible to install LED lamps instead of regular ones?

It is possible, but you need to consider two points:

1. LEDs have less resistance, so the turn signals will flash 太快 (you need to put relay with load or resistors).
2. On Sunny before 2000 may work CAN bus error (if there is an on-board computer).

Recommended lamps: PY21W LED from Philips or Osram.