Find a fuse

Vauxhall Astra · 2021

2021 Vauxhall Astra Horn Fuse

Horn silent when you press the pad? Check the fuse that protects it first.

  • UK specification
  • Verified data
  • Checked 15 October 2026
  • Sources

Partly covered: Vauxhall’s November 2021 Astra handbook prints no fuse chart (a defective fuse must be replaced by a workshop). The chart below is from the August 2020 edition and applies only to cars that came with that handbook.

Quick answer

Verified

Vauxhall’s handbook doesn’t print fuse ratings, so none is shown. Fit a replacement with the same rating as the fuse you remove — the handbook says: “Data on the replacement fuse must match the data on the defective fuse.”

Fuse
34
Fuse box
Engine compartment
Location
The fuse box is in the front left of the engine compartment.

Where is the fuse box?

Engine compartment fuse box

The fuse box is in the front left of the engine compartment.

  1. Disengage the cover and remove it.
  2. After having changed defective fuses, close the fuse box cover and press until it engages.
  3. If the fuse box cover is not closed correctly, malfunction may occur.

Fuse box diagram

Full 2021 Vauxhall Astra fuse chart
Engine compartmentCarFixData schematic
Engine compartment fuse box: map of 57 fuse positions, fuse 34 highlighted123456789101112131415161718192021222324252627282930313233353637383940414243444546474849505152535455565734
This fuseOther fuse positionsNot usedOur own schematic, drawn from the fuse positions printed in Vauxhall’s handbook illustration of this fuse box. Not to scale and not a manufacturer drawing — always match the number on the fuse box before pulling a fuse.

Where to look

  • 34

    The fuse box is in the front left of the engine compartment.

    Fuse · Horn

    Highlighted on the engine compartment map.

The map shows where each fuse sits. Always confirm the number against the legend on the fuse box cover before pulling anything.

How to replace the fuse safely

  1. Switch off the ignition and all electrical equipment. Take the key out, or move a keyless fob away from the car.
  2. Open the fuse box and find the fuse using the number on the cover legend or the chart on this page.
  3. Pull the fuse straight out with the plastic fuse puller (usually clipped inside the fuse box) or fine-nose pliers.
  4. Look at the metal strip inside the fuse. A broken or burnt strip means it has blown.
  5. Fit a new fuse with exactly the same amperage rating. The number on top and the colour should match.
  6. Refit the cover, switch on and test the component.
  • Never fit a fuse with a higher amperage rating than specified. It can let wiring overheat.
  • Never bridge a fuse with wire, foil or anything else.

Fuse keeps blowing?

A fuse that blows again straight away is doing its job. Something on that circuit is drawing too much current. Common causes are damaged wiring shorting to the bodywork, a failing motor or socket, water getting in, or a faulty accessory. Fitting fuse after fuse, or a bigger fuse, won’t fix the fault and can overheat the wiring. Have the circuit tested by an auto electrician.

Not the fuse? Check these next.

  • Horn unit itself

    Horns sit at the front of the car, exposed to water and road salt. A corroded horn or connector is a common cause.

  • Steering wheel contact

    The horn pad connects through a contact inside the steering wheel. If the horn works only at some wheel positions, that contact may be worn.

  • Shared fuse

    If other items on the same fuse have also stopped, suspect the fuse or its supply rather than the horn.

Sources & verification

Status
Verified
Specification
UK market
Last checked
15 October 2026

Fuse layouts can differ between trim levels and optional equipment. Always confirm against the legend on your fuse box.