Vauxhall Astra · 2020
2020 Vauxhall Astra Towbar Fuse
Trailer lights or towing electrics not working? Find the fuses Vauxhall lists for the trailer module and trailer outlet / socket.
- UK specification
- Verified data
- Checked 15 October 2026
- Sources
Quick answer
VerifiedApplies toHandbook edition October 2019Handbook edition August 2020
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.”
Rear view camera / Inside rear view mirror / Trailer module
- Fuse
- 44
- Fuse box
- Engine compartment
- Location
- The fuse box is in the front left of the engine compartment.
Trailer module
- Fuse
- 3
- Fuse box
- Load compartment
- Location
- The fuse box is located on the left side of the load compartment behind a cover.
Trailer outlet
- Fuse
- 16
- Fuse box
- Load compartment
- Location
- The fuse box is located on the left side of the load compartment behind a cover.
Trailer outlet
- Fuse
- 17
- Fuse box
- Load compartment
- Location
- The fuse box is located on the left side of the load compartment behind a cover.
Where is the fuse box?
Engine compartment fuse box
The fuse box is in the front left of the engine compartment.
- Disengage the cover and remove it.
- After having changed defective fuses, close the fuse box cover and press until it engages.
- If the fuse box cover is not closed correctly, malfunction may occur.
Load compartment fuse box
The fuse box is located on the left side of the load compartment behind a cover.
- Remove the cover.
- Disengage the fuse box cover and remove it.
- After having changed defective fuses, close the fuse box cover and press until it engages.
Fuse box diagram
Full 2020 Vauxhall Astra fuse chartWhere to look
- 44
The fuse box is in the front left of the engine compartment.
Fuse · Rear view camera / Inside rear view mirror / Trailer module
Highlighted on the engine compartment map.
- 3
The fuse box is located on the left side of the load compartment behind a cover.
Fuse · Trailer module
Highlighted on the load compartment map.
- 16
The fuse box is located on the left side of the load compartment behind a cover.
Fuse · Trailer outlet
Highlighted on the load compartment map.
- 17
The fuse box is located on the left side of the load compartment behind a cover.
Fuse · Trailer outlet
Highlighted on the load 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
- Switch off the ignition and all electrical equipment. Take the key out, or move a keyless fob away from the car.
- Open the fuse box and find the fuse using the number on the cover legend or the chart on this page.
- Pull the fuse straight out with the plastic fuse puller (usually clipped inside the fuse box) or fine-nose pliers.
- Look at the metal strip inside the fuse. A broken or burnt strip means it has blown.
- Fit a new fuse with exactly the same amperage rating. The number on top and the colour should match.
- 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.
Vauxhall-fitted or aftermarket
These fuses cover the circuits Vauxhall labels in its handbook. An aftermarket towbar kit may have its own separate fuse.
Trailer socket and plug
Corroded pins in the towbar socket or trailer plug are a common cause. Clean and check them.
Sources & verification
Applies toHandbook edition October 2019
- Manufacturer manual listingVauxhall UK — Owners’ manuals: “Astra owners’ manuals” · Vauxhall Motors · October 2019 — Owners' manual · Accessed 15 October 2026
- Owner’s manualVauxhall Astra Owner’s Manual — Edition October 2019 (ID-VASKORIE1910-en) · Vauxhall Motors · Vehicle care › Electrical system › Fuses (pp. 240–246) · Accessed 15 October 2026
Applies toHandbook edition August 2020
- Manufacturer manual listingVauxhall UK — Owners’ manuals: “Astra owners’ manuals” · Vauxhall Motors · August 2020 — Owners' manual · Accessed 15 October 2026
- Owner’s manualVauxhall Astra Owner’s Manual — Edition August 2020 (ID-VASKORIE2008-en) · Vauxhall Motors · Vehicle care › Electrical system › Fuses (pp. 238–245) · Accessed 15 October 2026
Fuse layouts can differ between trim levels and optional equipment. Always confirm against the legend on your fuse box.