Fuse and relay box diagram Opel/Vauxhall Astra G Fuse and relay box diagram Astra G. Identifying and legend fuse box. 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. Fuses and relays in the engine bay - Opel Astra H Fanklub Fuses and relays in the Astra H can be found in two places: in the engine bay and the luggage compartment. Fusebox in the engine compartment exists in two variants (1 i 2). They differ from each other in that they have different assigned fuses to protect individual circuits.