Fuse and relay box diagram Opel/Vauxhall Astra G (60A) Fuse box/relay plate-fascia 1, headlamps-low beam, daytime running lamps, alarm system, immobilizer control module, engine management. F3 (60A) Fuse box/relay plate-fascia 1. F4 (20A) [Astra Mk4/G] [98-04] - Astra MK4 / G & Zafira A FUSE BOX May 26, 2012The main fuse box is located behind the tray on the right hand side, just under the light switch. You will need quite a wide flat blade screw driver to remove the tray to expose the fuse box Astra g mk4 2003 fuse box??? | Yahoo Answers Dec 15, 2006Can some 1 tell me where the main fuse box is located for the astra g mk4 2003 model.