Fuses and relays box diagram Opel/Vauxhall Astra H For the Opel/Vauxhall Astra H fifth generation 2004, 2005, 2006, 2007, 2008, 2009, 2010 model year. Fuse box located. Fuse box in engine compartment. Fuse and relay box diagram Opel/Vauxhall Astra G fuse box diagram (Astra G pre 2001). legend. R1 . R2. Horn relay. R3. Headlamp high beam relay. R4. Rear screen wiper relay. R5. Door mirror heater relay. R6. Tags: Fuse box diagram Opel/Vauxhall. Related Posts. Fuses and relay Opel/Vauxhall Meriva B. Fuses and relay Opel/Vauxhall Vectra B. Fuses and relay Opel/Vauxhall Frontera B. Ads.