Find a fuse

Vauxhall Astra · 2018

2018 Vauxhall Astra OBD Port Fuse

Code reader won’t power up? Check the fuse for the OBD diagnostic socket (Vauxhall calls it the diagnostic connector or data link connector).

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

Partly covered: Vauxhall published August 2017, January 2018, March 2018 and August 2018 Astra handbooks that could apply to a 2018 car, and their fuse charts differ. Vauxhall doesn’t say which cars each edition applies to, so we can’t tell which one matches a particular 2018 Astra. Every official chart is shown below — check the edition printed near the end of your handbook, or compare with the fuse box legend in your car, before removing anything.

Quick answer

Verified

Applies toHandbook edition August 2017Handbook edition January 2018Handbook edition March 2018Handbook edition August 2018

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
19
Fuse box
Instrument panel
Location
Instrument panel (Vauxhall: “The fuse box is located behind a cover.”).

Where is the fuse box?

Instrument panel fuse box

Instrument panel (Vauxhall: “The fuse box is located behind a cover.”).

The fuses are the same in every handbook edition shown here — only the steps for opening this fuse box are worded differently:

Handbook edition August 2017 · Handbook edition January 2018

  1. Pull the cover and remove.
  2. Vehicles with power connector: If the fuse cover has a power connector, it must be removed by using an adapter and a screwdriver.
  3. The adapter is stowed in the glovebox.
  4. The screwdriver is stowed in the load compartment.
  5. Attach the adapter to the power connector.
  6. Push the screwdriver through the recess in the adapter.
  7. Remove the cover by pulling the screwdriver.
  8. After having changed defective fuses, close the fuse box cover and press until it engages.
  9. Vehicles with power connector:
  10. 1. Apply the cover on the right side.
  11. 2. Fold the left side of the cover forwards.
  12. Take care that the securing clamp is guided as shown in the illustration.

Handbook edition March 2018

  1. Pull the cover on the left side.
  2. Vehicles with power connector: If the fuse cover has a power connector, it must be removed by using an adapter and a screwdriver.
  3. The adapter is stowed in the glovebox.
  4. The screwdriver is stowed in the load compartment.
  5. Attach the adapter on the left side of the power connector.
  6. Push the screwdriver through the recess in the adapter.
  7. Remove the cover by pulling near the tip of the screwdriver.
  8. After having changed defective fuses, close the fuse box cover and press until it engages.
  9. Vehicles with power connector:
  10. 1. Apply the cover on the right side.
  11. 2. Fold the left side of the cover forwards.
  12. Take care that the securing clamp is guided as shown in the illustration.

Handbook edition August 2018

  1. Pull the cover on the left side to remove.
  2. After having changed defective fuses, close the fuse box cover:
  3. 1. Apply the cover on the right side.
  4. 2. Fold the left side of the cover forwards.
  5. Take care that the securing clamp is guided as shown in the illustration.

Fuse box diagram

Full 2018 Vauxhall Astra fuse chart
Instrument panelCarFixData schematic
Instrument panel fuse box: map of 37 fuse positions, fuse 19 highlighted12345678910111213141516171820212223242526272829303132333435363719
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

  • 19

    Instrument panel (Vauxhall: “The fuse box is located behind a cover.”).

    Fuse · Data link connector

    Highlighted on the instrument panel 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.

  • Ignition on

    Most scanners need the ignition on to talk to the car, even if they light up without it.

  • Scanner compatibility

    Some basic scanners can’t communicate with every car. Try another scanner before assuming a fault.

  • Bent pins

    Check the socket under the dashboard for bent or pushed-back pins.

Sources & verification

Applies toHandbook edition August 2017

Status
Verified
Specification
UK market
Last checked
15 October 2026

Applies toHandbook edition January 2018

Status
Verified
Specification
UK market
Last checked
15 October 2026

Applies toHandbook edition March 2018

Status
Verified
Specification
UK market
Last checked
15 October 2026

Applies toHandbook edition August 2018

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.