Opel Astra G (1998-2009) – Fuse Box and Relay Diagrams

Opel Astra G / Vauxhall Astra Mk4 (1998-2009, including Astra Classic II) uses a cabin fuse and relay carrier and high-current fuse and relay units in the engine compartment. Some factory equipment was revised around the 2001 model year. Earlier and later cars have different cabin fuse ratings and additional circuits for factory xenon lamps, diesel supplementary heating and the convertible roof.

The six complete tables retain all 154 fuse, relay, vacant-position and comparison rows from the revised Polish original: early cabin (56), later cabin (65), engine main fuses (8), early engine relays (8), later engine relays (8) and equipment changes (9). The tables preserve the specific 20 A versus 15 A cigarette-lighter protection on the two illustrated cabin layouts. The actual fuse card for the vehicle’s manufacturing date, market and fitted engine remains authoritative.

Where is the fuse box in the Opel Astra G?

Inside the cabin: turn off the ignition and all electrical consumers. On a left-hand-drive Astra G, find the fuse and relay carrier behind the small pull-down storage compartment in the lower driver’s side dashboard, beneath and to the side of the steering wheel. Compress the side catches, lower the storage tray fully, release the retaining clips or quarter-turn screws on the inner frame and swing the panel down if fitted. Do not remove an SRS airbag cover or force the main wiring harness.

Under the bonnet: the main 60-80 A fuse holder and engine management / cooling fan relay modules are positioned around the battery and side of the engine compartment. Their exact mounting changes by engine and air conditioning. With the engine and cooling fans stopped, carefully release the appropriate cover. High-current links should only be serviced using the manufacturer’s battery-isolation procedure. Some diesels also have separate glow-plug and auxiliary heater protection not installed in petrol vehicles.

Passenger compartment – older Astra G (up to approximately 2000)

The older fuse carrier has relay positions R1-R15 and regular fuse numbers F1-F41. In the restored source chart F3 protects rear-window heating at 40 A, while F36 for the lighter and heated seats is rated 20 A. F22 (15 A) and F29 (10 A) serve the indicators and hazards, and F14 (30 A) protects the front windscreen wiper motor. Empty positions are not permission to install a fuse without checking the equipment card.

Passenger compartment – revised Astra G (from approximately 2001)

The later fuse panel adds positions F42-F50 for equipment such as xenon headlights (from the appropriate 2002 model year), supplementary diesel heating and cabriolet circuits. F13 changes from 7.5 A to 5 A on the shown card, F36 from 20 A to 15 A and F39/F40 from 7.5 A to 5 A. The archive image file contains the incorrect text “po-2011”, but its diagram describes the 2001-era Astra G electrical revision, not a 2011 model or Astra J.

High-current under-bonnet fuse box – F1-F8

This power distributor protects the ignition switch, passenger fuse board main feeds, ABS, electronic power steering, engine management and the radiator cooling fans. F1-F3 and F5 are 60 A in the documented variant, while F7 is 80 A. F4 and F8 use 20 A on the specified petrol-engine and air-conditioning configurations, but other sources describe different high-current carrier versions; do not substitute ratings between housings or model years.

Engine compartment relays – vehicles built before around 2001

In the original earlier engine relay carrier, position 4 controls the petrol fuel pump, 2/3/6 operate radiator cooling fans on different engines, and 7 is the timed headlamp washer relay. Positions 1, 5 and 8 are unoccupied on the illustrated carrier. Relay sockets and connector pins can differ between the X12XE, X14XE, X16XEL, X18XE1 and X20XEV engines.

Engine compartment relays – vehicles from around 2001

The later carrier retains cooling and headlamp washer relays but uses distinct fuel-pump controls: position 3 for engines other than Z20LET/Z22SE, and position 4 for Z20LET or Z22SE. The Z20LET turbo engine may have an additional coolant circulation pump relay at position 5. The drawing is repeated from the Polish article but the assignments in this later table must be used, not the earlier relay identities.

Astra G model-year and equipment differences

These nine rows compare the main changed fuses instead of assuming the earliest and latest Astra G diagrams use the same currents. Changes to F13, F15, F18, F36, F39 and F40 are particularly important. A car originally protected by 15 A must not receive a 20 A fuse simply because that rating appears on the earlier chart.

Typical Astra G electrical faults and fuse checks

Cigarette lighter / accessory outlet dead: check cabin F36, rated 20 A on the older diagram or 15 A on the revised panel. Remove the charger first and check for small metal objects inside the socket. Indicators or hazard lamps not operating: F22 (15 A), F29 (10 A) and R8/R9 can be involved; a failure of only one indicator also requires bulb, socket and earth inspection.

Front wipers failed: check F14 (30 A) and relay R12, then the linkage and motor. Heated rear screen not working: inspect F3 (40 A), relay R14 and the heating strips. Horn not sounding: check F10 (15 A), relay R2 and horn wiring. Central locking failed: cabin F11 (20 A) and door loom or central-locking unit.

Electric windows stopped: F17 and F20 (30 A each) supply the windows in the documented configuration; control circuits can include F15. A single failed door usually needs inspection of the switch, regulator and flexible door wiring. One dipped headlamp failed: right F6 (10 A) and left F24 (10 A) are individually protected in the standard halogen installation. Factory xenon equipment on later vehicles also uses F43/F44 (20 A).

Cooling fan stopped: inspect the correct engine-specific F4/F8 and its fan relays. Z20LET fuel pump or auxiliary cooling issue: compare the later relay holder’s positions 4 and 5 against the engine code, not the earlier carrier’s position 4 alone.

Other Opel generations use different fuse carriers. See the Opel Astra J (2012-2013) and Opel Astra K (2016) for their own engine and interior fuse diagrams. Neither is a replacement for Astra G.