Find the fuse-box access points and selected electrical circuits for the Volvo V40. Use the interactive index and table below to identify the circuit, then compare it with the label fitted to your own vehicle.
Covered version. V40 model year 2019: selected engine-compartment fuses. This does not cover the 1990s V40 or every engine variant. Petrol/diesel alternative entries are excluded. Options apply only when fitted. Positions 7–18 and 46 are JCASE; 19–45 and 47–48 are Mini Fuse.
Fuse box access
The selected positions are in the engine-compartment fuse box. Follow the linked handbook to release the cover and identify the numbered position. Other boxes have independent numbering. Do not disturb battery connections or high-current protection to reach a fuse.
Interactive circuit index
Hover, focus or tap a button to highlight its description. These buttons are a circuit index, not a drawing of the physical fuse positions. Only the circuits listed below are covered.
Select a circuit
Selected fuse assignments
Optional circuits apply only when the equipment is fitted. Match both the rating and physical type. Entries marked “workshop replacement” require workshop service according to Volvo.
| Box / version | Reference | Rating / type | Protected circuit |
|---|---|---|---|
| Engine compartment | 20 A · JCASE · workshop replacement | Headlamp washers | |
| Engine compartment | 40 A · JCASE · workshop replacement | Cabin ventilation fan | |
| Engine compartment | 40 A · JCASE · workshop replacement | Heated windscreen, right side | |
| Engine compartment | 40 A · JCASE · workshop replacement | Heated windscreen, left side | |
| Engine compartment | 20 A · JCASE · workshop replacement | Parking heater | |
| Engine compartment | 20 A · JCASE · workshop replacement | Front windscreen wiper | |
| Engine compartment | 5 A · Mini Fuse | CEM reference voltage and support battery | |
| Engine compartment | 15 A · Mini Fuse | Horn | |
| Engine compartment | 5 A · Mini Fuse | Brake lights | |
| Engine compartment | 5 A · Mini Fuse | Headlamp control | |
| Engine compartment | 5 A · Mini Fuse | Internal relay coils | |
| Engine compartment | 15 A · Mini Fuse | Front tunnel-console 12 V socket | |
| Engine compartment | 15 A · Mini Fuse | Transmission control module | |
| Engine compartment | 15 A · Mini Fuse | Rear tunnel-console 12 V socket | |
| Engine compartment | 5 A · Mini Fuse | Engine control module | |
| Engine compartment | 20 A · Mini Fuse | Right-hand power seat | |
| Engine compartment | 15 A · Mini Fuse | Oxygen sensors and cooling-fan relay coil | |
| Engine compartment | 15 A · Mini Fuse | Engine control module | |
| Engine compartment | 10 A · Mini Fuse | Headlamp levelling | |
| Engine compartment | 10 A · Mini Fuse | Coolant pump, vehicles without parking heater |
What to check first
Front tunnel-console 12 V socket: 25 (15 A); rear tunnel-console socket: 28 (15 A). Position 28 is not identified as a cargo socket in this source. Horn: 20 (15 A). Wipers: 18 (20 A, JCASE); Volvo requires workshop replacement for JCASE fuses.
Replacing a fuse safely
Park the car, switch off the ignition and electrical consumers, and follow the matching handbook. Remove only an identified, accessible fuse. Fit the same physical type and specified current rating. Never bridge a fuse or increase its rating. If it fails again, stop and diagnose the underlying fault.
Frequently asked questions
Does this fit every model year?
No. Check the generation, handbook edition, steering position, engine and equipment. A familiar model name or an identical fuse number is not enough to confirm a match.
Where are the relays and omitted circuits?
Use the vehicle-specific workshop wiring information for relay positions, main protection and circuits omitted from this selection. An empty fuse position is not a confirmed accessory feed. Safety-system and high-voltage work requires the correct professional procedure.
More Volvo fuse guides
Fuses & Relays · Volvo · Volvo · Car makes
Reference handbook: Volvo V40 · 2019.