1989 GMC: fuse panel diagram for both the in cab - ASAP Jul 28, 2007I was trying to find a fuse panel diagram for both the in cab and under hood fuse boxes for a 1989 GMC Pick up. It has - Answered by a verified Auto Mechanic my wife tried to jump the battery by hooking it up to the fuse box. none of the internal SOLVED: Where is the fuse box in a 1989 GMC S-15 Jimmy Nov 15, 2010Where is the fuse box in a 1989 GMC S-15 Jimmy? - GMC 1989 S-15 Jimmy question. Search Fixya Where is the fuse box in a 1989 GMC S-15 Jimmy? Posted by rastignitcuh on Nov 15, 2010. where is fuse panel for windshield wipers on a 1989 GMC S15 pickup truck. Dec 10, 2016 | 1989 GMC S-15 Jimmy.