I need the diagram for the fuse box of the 1989 Geo Apr 10, 2012I need the diagram for the fuse box of the 1989 Geo Tracker my blinkers don't work and I don't know where - Geo 1989 Tracker question. Search Fixya Browse Categories SOURCE: radio fuse on 1997 Geo Metro. the appropriate fuse is blue (15A) and is third or fourth from the side of the car (the narrow end). Look at the fuse box cover. Where is main fuse on 1989 Geo Metro - answers Answer . If your Geo is like mine (a 1997 Metro) there is no fuse for the horn. There is a relay located on the top of the fuse box, it is the second one back from the firewall.