Fuse and relay box diagram Opel/Vauxhall Astra G Fuse and relay box in the engine compartment Astra G. located. fuse box diagram. early models. late models. legend early and late models. F1 (60A) Ignition switch. F2 (60A) Fuse box/relay plate-fascia 1, headlamps-low beam, daytime running lamps, alarm system, immobilizer control module, engine management. F3 Fuses and relays box diagram Opel/Vauxhall Astra H Fuse box in luggage compartment Astra H. Depending on the equipment version, there are two different fuse boxes in the luggage compartment for differing electrical circuits.