Nissan Terrano 1 (R20): fuse and relay diagrams with explanation by year

Nissan Terrano 1 (internal designation R20) is a legendary frame SUV, released in 1986 and produced until 2005 in various modifications. Despite the simplicity of the design, the electrical circuit of the car requires attention, especially when it comes to fuses and relays. The operation of everything depends on their serviceability - from the headlights to the fuel pump.

In this article you will find complete fuse box diagrams for Terrano 1 (including restyled versions), their location in the cabin and under the hood, and also decoding of each element indicating the rating and protected circuits. We'll also look at common problems (like why your dashboard fuses are blowing or why your cooling fan won't work) and give practical diagnostic tips.

Where are the fuse boxes in Nissan Terrano 1

B Nissan Terrano 1 provided two main fuse boxes:

• 🔧 Main unit in the cabin — located to the left of the steering column, under the instrument panel. Access to it opens after removing the protective cover (attached with latches or one screw).
• 🚗 Additional block under the hood - located next to the battery (on some versions - on the left mudguard). Responsible for high load circuits: cooling fan, headlights, starter.

On diesel versions (for example, TD27) may be present third relay block - it is usually installed on the engine panel on the passenger side. Its task is to control the high pressure fuel pump (TDI) and glow plugs.

Important: on cars produced before 1995, the block diagrams may differ! For example, in the early Terrano 1 (1986–1990) the cigarette lighter fuse was located in the interior block under number #15, and in later versions (1995–2005) - under #20.

Diagram and decoding of the cabin unit fuses

Salon block Nissan Terrano 1 contains 15 to 20 fuses (depending on the year of manufacture and configuration). Below is a universal diagram for most versions:

Fuse no.	Denomination (A)	Protected circuit	Notes
#1	10A	Side light (left side), license plate light	Often burns out when installing LED lamps
#5	15A	Low beam (right headlight), steering column switch	If it burns out, check the relay #3 in the engine compartment
#10	20A	Cigarette lighter, 12V socket	On versions after 1998, the rating is increased to 25A
#14	10A	Instrument panel, speedometer, tachometer	When burnout, pointer instruments “freeze”
#18	30A	Electric windows, central locking	If it burns out, check the door motors for short circuits.

The complete diagram for your version can be found at back side of the block cover (sticker with decoding). If it is not there, focus on the year of manufacture:

• 📅 1986–1992: 15 fuse block, no relays.
• 📅 1993–1997: block with 18 fuses + 2 relays (fan, horn).
• 📅 1998–2005: block with 20 fuses + 4 relays (ABS and fog light relays added).

How to check a fuse without a tester?

Take out the fuse and look at the light: if the thread inside is broken, it has burned out. You can also replace it with a known good one with the same rating (for example, from the cigarette lighter circuit).

Engine compartment fuse and relay box: diagram and features

Block under the hood Nissan Terrano 1 is responsible for highly loaded chains and usually contains:

• 🔋 4–6 fuses (rated from 30 to 100A).
• ⚡ 3–5 relays (fan, starter, fuel pump, etc.).

Typical scheme for petrol versions (GA16, SR20):

element	Rating/Type	Purpose
F1	60A	Main fuse (power supply to the entire unit)
F2	30A	Electric cooling fan
R1	Relay	Cooling fan (low speed)
R3	Relay	Fuel pump (on petrol versions)

On diesel Terrano 1 (TD27) in this block a relay is added R4 - it controls glow plugs. If the engine does not start well when cold, first check this relay and fuse. F4 (50A).

⚠️ Attention: fuse F1 (60A) - this is "main" fuse the entire engine compartment. If it burns out, the car is completely de-energized. The cause is usually a short circuit in the generator or starter circuit. Do not replace it with a fuse of a higher rating!

Typical faults and why fuses burn

Owners Nissan Terrano 1 Most often they encounter the following problems:

1. The cigarette lighter fuse has blown (#10 or #20) - a short circuit in the socket or a connected device (for example, a faulty compressor) is to blame.
2. The cooling fan fuse is on (F2) — check the fan motor for jamming or broken windings.
3. Power windows don't work - fuse burned out #18 or a relay in the block under the hood.
4. The instrument panel does not light up - the fuse is at fault #14 or a break in the backlight circuit.

Common mistake - replacing the fuse with a bug (wire or coin). This leads to:

• 🔥 Fire in the wiring (especially dangerous for high current circuits).
• 💥 Failure of the control unit (for example, ECU on injection versions).

How to properly replace a fuse: step-by-step instructions

Replacing the fuse in Nissan Terrano 1 requires accuracy. Follow the algorithm:

Step 1. Open the fuse box. In the interior unit, press the lid latches; in the engine compartment, press the latches.

Step 2. Remove the blown fuse plastic tweezers (usually attached to the block cover). Do not use metal tools!

Step 3. Install a new fuse same denomination. For example, if it burned 10A, put 15A This is not possible - it will damage the wiring.

Step 4. Connect the battery and check the circuit operation. If the fuse blows again, look for a short circuit.

⚠️ Attention: On diesel Terrano 1 when replacing the glow plug relay (R4) be sure to reset the errors from the control unit! Otherwise, the engine may not start. To reset, disconnect the battery for 10 minutes.

Where to buy fuses and relays for Terrano 1

For Nissan Terrano 1 standard fuses fit "knife" type (blade) the following denominations: 5A, 7.5A, 10A, 15A, 20A, 25A, 30A. Relay - usually 12V, 30A/40A (depending on the chain).

Where to look:

• 🛒 Auto stores: Lada-Image, AutoDetail, Exist (articles: fuses - Hella 8EA 002 137-011, relay - Bosch 0 332 019 150).
• 🌍 Online: AliExpress (sets of 100 pieces for 200–300 rubles), AutoPro, Zapchasti.ru.
• 🔧 Showdown: original relays with Terrano 1 or Nissan Pathfinder R50 (connector compatible).

Advice: buy colored fuse sets - it’s easier to navigate (for example, 10A - red, 20A - yellow). For relays, take only sealed options (For example, HELLA or VEMO) to avoid contact oxidation.

FAQ: Frequently asked questions about Nissan Terrano 1 fuses

Is it possible to install a larger fuse if it is constantly on?

No! This will lead to overheating of the wiring and the risk of fire. If the fuse blows, look for the cause: a short circuit, a faulty consumer (for example, a window lift motor) or a damaged wire.

Where is the fuel pump fuse on a Terrano 1 with SR20 engine?

On petrol versions with SR20 The fuel pump fuse is located in engine compartment under number F3 (15A). Pump relay - R3 in the same block.

Why did it blow again after replacing the cigarette lighter fuse?

Reasons:

1. Short circuit in the cigarette lighter socket (check the contacts with a screwdriver).
2. A faulty device connected to a 12V outlet (for example, a compressor or charger).
3. The wire from the cigarette lighter to the fuse box is damaged (often frayed under the dashboard).

How to test the cooling fan relay?

Remove the relay R1 or R2 (depending on speed) and check it:

1. Serve 12V to contacts 85 (+) And 86 (–) - there should be a click.
2. Check the resistance between 30 And 87 - must be 0 ohm (closed).

If the relay does not click, replace it. New price: ~300 rub.

Will the fuse box from the Nissan Pathfinder R50 fit the Terrano 1?

Yes, the blocks are interchangeable, but there are nuances:

• On Pathfinder R50 (1996–2004) block identical Terrano 1 1998–2005
• In the early Terrano 1 (before 1995) the relay location may not be the same.
• Before replacing, check the diagram - sometimes the purpose of the fuses is different #12 And #16.