Fog lights (PTF) on Nissan Almera N16 - an important safety element, especially in poor visibility conditions. However, their operation directly depends on the serviceability of the relay, which often fails due to voltage surges, corrosion or natural wear. If your PTFs stop turning on, blink or are unstable, the problem most likely lies in the relay.

In this article we will look at all aspects of working with the PTF relay on Almera N16: from fault diagnosis to step-by-step replacement. You will learn how to test a relay with a multimeter, where it is located in the fuse box, which analogues are suitable for replacement, and why even a new relay can quickly burn out. We will pay special attention hidden pitfalls when connecting PTF via a button - an error in the circuit can lead to a short circuit or failure of the lighting control unit.

Where is the PTF relay located on Nissan Almera N16?

B Almera N16 The fog light relay is located in main fuse and relay box, which is located inside the car - under the instrument panel on the driver's side. To access:

  1. Open the driver's door and sit in the seat.
  2. Under the steering column, find the plastic fuse box cover (it is secured with two latches).
  3. Carefully pry the cover with a screwdriver or flat object and remove it.

PTF relay on Almera N16 usually installed in a socket R11 (the number may vary slightly depending on the year of manufacture). To avoid mistakes, refer to the diagram printed on the inside of the block cover. The relay is standard size 12V 30/40A and labeling "FOG LAMP" or "PTC".

⚠️ Attention: On some versions Almera N16 (especially 2003–2006) the PTF relay can be combined with a low beam relay. In this case, replacement requires special care - incorrect installation will lead to failure of both lighting circuits.

If you are unsure of the location, use connection diagram at the end of the article or use a multimeter to check the presence of voltage at the socket contacts with the ignition on and the PTF button activated.

Signs of PTF relay malfunction

The fog light relay rarely fails suddenly; it is usually preceded by characteristic symptoms. Here are the main signs that the relay requires checking or replacement:

  • 🔴 PTFs do not turn on at all - neither when pressing a button, nor when “forcing” it by closing contacts.
  • 💡 Headlights flicker or are unstable (turn on every other time, turn off spontaneously).
  • 🔊 Clicking sounds from the fuse box when you try to turn on the PTF, it is a sign of “sticking” relay contacts.
  • 🔥 Burning smell or melted relay housing - evidence of a short circuit or overheating.
  • 🚗 PTFs only work when you “tap” the relay - a temporary solution, but a signal for an urgent replacement.

It is important to distinguish a relay malfunction from other problems:

  • If PTF fuse blows immediately after replacement - look for a short circuit in the wiring or lamps.
  • If PTF button does not lock — the problem is in the button itself or the steering column switch.
  • If one headlight doesn't work, and the second one is working - check the lamp, connector or wiring on the side of the faulty headlight.
📊 What symptom of PTF malfunction have you encountered?
  • They don't turn on at all
  • Flashing or unstable
  • Clicking noises in the fuse box
  • Burning smell/melted relay
  • Other symptom

How to check the PTF relay with a multimeter?

Relay test Nissan Almera N16 does not require special skills, but you will need a multimeter (or at least a 12V test lamp). Follow the step by step instructions:

Step 1: Removing the Relay

Remove the relay from the socket R11 (or another if your scheme is different). Pay attention to the markings of the contacts - they are usually labeled as 85, 86, 87, 87a, 30.

Step 2: Check the winding

Set the multimeter to resistance test mode (200 ohms). Connect the probes to the contacts 85 And 86 (control pins). A working relay should show resistance 50–120 Ohm. If the device shows 0 (short circuit) or ∞ (break) - the relay is faulty.

Step 3: Checking the contact group

Switch the multimeter to “continuity” mode (or resistance measurement). Connect the probes to the contacts 30 And 87 - there must be resistance ∞ (open). Then apply voltage 12V to contacts 85 And 86 (can be from a battery through a light bulb). In this case, a click should be heard, and resistance between 30 And 87 should become 0 (closed). If this does not happen, the relay must be replaced.

⚠️ Attention: Do not apply voltage to the contacts 30 And 87 directly - this will lead to a short circuit! Use only control terminals 85/86.

Remove the relay from the socket|Check the winding resistance (85–86)|Check the open state (30–87)|Apply 12V to 85–86 and check the short circuit (30–87)|Visually inspect the housing for melting-->

Which PTF relay should I choose for replacement?

For Nissan Almera N16 standard size relays with parameters are suitable 12V 30/40A. However, there are nuances:

Relay type Article number (OEM) Analogues Notes
Original Nissan 25230-3M200 Hella 4RA 003 547-3, Bosch 0 332 019 150 The most reliable, but expensive solution. Suitable for all versions of Almera N16.
Universal 4-pin — Sontec 75.3777, Febi 15316 Cheaper than the original, but may have a shorter resource. Check contacts for corrosion.
5-pin (with 87a) 25230-4M000 Valeo 406031, Mitsuba RR4-12V Used in versions with automatic light control. Not interchangeable with 4-pin!

When choosing, pay attention to:

  • 🔧 Number of contacts - on Almera N16 Most often a 4-pin relay is used, but some configurations may have a 5-pin relay.
  • 📏 Case size - standard "cube" 25.4×25.4×20 mm. Make sure the new relay physically fits into the socket.
  • 🔋 Rated current - no less 30A (for PTF with halogen lamps). For LED PTFs, you can use a relay on 20A.

If you install non-original relay, we recommend choosing brands Hella, Bosch or Valeo — they ensure stable operation even during voltage surges in the on-board network. Cheap Chinese analogues often “click” when heated or fail after a few months.

💡

Before buying a relay, check it for counterfeit: original parts have clear markings, smooth seams on the body and do not smell of low-quality plastic.

Step-by-step replacement of the PTF relay on Almera N16

Replacing the fog light relay takes no more than 10 minutes, but requires care. Follow the instructions:

Tools and materials

  • 🔧 Flathead screwdriver (for removing the fuse box cover).
  • 🔍 Flashlight or head light (to illuminate the block).
  • 📋 New relay (tested for performance).
  • 🧴 Contact lubricant (optional, for protection against corrosion).

Replacement process

  1. Turn off the ignition and remove the key from the lock.
  2. Remove the fuse box cover (as described higher).
  3. Find the PTF relay (socket R11) and carefully remove it by pulling it up. If the relay is stuck, do not use force - swing it left and right.
  4. Insert the new relay into the socket until it clicks. Make sure it fits snugly, without distortion.
  5. Turn on the ignition and check the operation of the PTF. If the headlights do not come on, check the fuse F30 (10A) - it could burn out due to a short circuit.
⚠️ Attention: If after replacing the PTF relays still do not work and the fuse is intact, the problem may lie in broken wire between the relay and the PTF button or the button itself is faulty. In this case, diagnostics with a multimeter is required. connection diagram.
What to do if the new relay immediately burns out?

If the installed relay immediately fails, the reasons may be as follows:

1. **Short circuit in the wiring** - check the circuit from the relay to the PTF lamps for exposed wires or damaged connectors.

2. **Faulty PTF lamp** - a burnt-out lamp can cause a current surge. Replace the lamps with new ones (eg H11 55W).

3. **Problems with “ground”** - oxidized ground contact on the body or headlight unit leads to increased load on the relay. Clean and lubricate the contacts.

4. **Wrong Relay** - If you installed a 5-pin relay instead of a 4-pin (or vice versa), it can cause instant failure.

PTF connection diagram for Nissan Almera N16

To diagnose faults, it is useful to understand how the electrical circuit of fog lights works. Below is a simplified diagram for Almera N16 (2000–2006):



+12V (АКБ)


│


▼


[Предохранитель F30 (10A)] ←─┬─→ [Кнопка ПТФ]


│                          │


▼                          ▼


[Реле ПТФ (R11)] ←───────────┘


│


▼


→ [Лампа ПТФ левая] ←─→ Масса (кузов)


│


▼


→ [Лампа ПТФ правая] ←─→ Масса (кузов)

Key points of the scheme:

  • 🔋 Power wire (+12V) comes from the fuse F30 (10A) in the fuse box.
  • 🔘 The PTF button closes the relay control circuit (contacts 85/86).
  • 💡 Relay switches +12V to PTF lamps through contacts 30/87.
  • ⚡ The “ground” of the lamps is connected to the body through separate bolts near each headlight.

If the PTFs do not work, check:

  1. Availability +12V on fuse F30 (with the ignition on).
  2. Signal passage from the PTF button to the contact 86 relay (must be 0V with the button off and +12V when turned on).
  3. Contact voltage 30 relay (must be +12V constantly).
  4. Integrity of wiring from relay to PTF lamps.
💡

If when you press the PTF button on the contact 86 no relay +12V, the problem is in the button, the steering column switch or a broken wire between them.

Frequent mistakes when replacing the PTF relay

Even experienced car owners make mistakes when working with fog light relays. Here are the most common:

  • 🔌 Ignoring the fuse - if the relay burns out, there is a high probability that the fuse has also blown F30. Replacing only the relay without checking the fuse will lead to repeated failure.
  • 🔧 Using a relay with other parameters - for example, installing a relay on 10A instead of 30A or 5-pin instead of 4-pin.
  • 💡 Untested PTF lamps - a burnt-out lamp can cause a current surge and burn out the new relay the first time it is turned on.
  • 🔋 Poor contact in socket - oxidized or bent contacts in the fuse box lead to heating and failure of the relay.
  • 📋 Incorrect button connection — if the PTF button is connected directly to the lamps, bypassing the relay, this will lead to an overload of the circuit.

To avoid mistakes, follow a simple rule: Before replacing a relay, always check the fuse, lamps and wiring integrity. If you install PTF yourself (for example, on version Almera N16 without standard fog lights), use a separate relay and fuse, and do not connect the headlights directly to the button!

💡

After replacing the PTF relay, check its operation with the low beams turned off and on - in some versions of the Almera N16, the PTFs are turned off automatically when the low beam is activated ("auto-off" function).

FAQ: Frequently asked questions about the PTF relay on Nissan Almera N16

Is it possible to drive without a PTF relay if the headlights work when the contacts are closed?

Technically yes, but this highly not recommended. With direct contact closure 30 And 87 current goes directly from the battery to the lamps, which can lead to:

  • Overheating of the wiring (especially if the wire cross-section is insufficient).
  • PTF buttons fail due to increased load.
  • Short circuit when the positive wire accidentally touches ground.

The relay protects the circuit from overloads and ensures stable operation. If it burns out, replace it as soon as possible.

Why does the new PTF relay click, but the headlights do not turn on?

This is a typical situation when the relay is triggered (a click indicates the contact group is closed), but the voltage does not reach the lamps. Reasons:

  • Fuse blown F30 (check it visually or with a multimeter).
  • The contacts in the relay socket have oxidized or burnt out (move the relay in the socket with the ignition on).
  • Broken wire between the relay and the PTF lamps (test the circuit with a multimeter).
  • The lamps themselves or their connectors are faulty (check the lamps for functionality).

Start diagnostics with the fuse and visually inspect the wiring near the lamps.

Which relay is suitable for Almera N16 with xenon PTF?

Xenon fog lights require a relay with higher rated current (no less 40A), since ignition units consume more energy when starting. Recommended options:

  • Hella 4RA 003 547-7 (40A).
  • Bosch 0 332 019 151 (40A).
  • Original Nissan 25230-4M001 (for versions with xenon).

Also make sure that the fuse in the PTF circuit is rated for 20A (and not at 10A, as in the standard version).

How to check the PTF button without a multimeter?

If you don't have a multimeter, you can test the button "short" using a test lamp or even a regular 12V light bulb:

  1. Remove the PTF button from the panel (carefully prying it off with a screwdriver).
  2. Disconnect the connector from the button. There should be 2 wires in the connector: one goes to ground, the other goes to the relay (usually red/yellow).
  3. Turn on the ignition and connect the test lamp between mass And red/yellow wire.
  4. Press the PTF button - if the lamp lights up, the button is working. If not, the button is faulty.

Alternative method: temporarily short the two contacts in the button connector with a screwdriver. If the PTF lights up, the problem is in the button.

Is it possible to install a PTF relay from another Nissan model?

Yes, but with reservations. Relays from other models Nissan (For example, Primera P12 or X-Trail T30) are often suitable in size and parameters, but there are nuances:

  • Make sure the relay has same number of contacts (4 or 5).
  • Check rated current - it must be no less 30A.
  • Please note pin layout - sometimes it may differ (for example, 85/86 swapped).

It is best to use relays with an identical part number or proven analogues from Hella/Bosch.