Just picked up a 1990 15 passenger g20 van with 113k on it. The issue im having has got to be electrical but i'm not sure where to start so looking for suggestions. So when i bought it, it had no battery so i installed an optima red top and it fired right up but one headlight didnt come on then it did and now works fine. The stereo worked good except the display would come and go? Now no display and nothing but static is all i get. Also all the dome lights worked fine but now they dont work at all? Then this morning the speedo wasnt working but the odometer was then the speedo started working? I'm thinking maybe the bulkhead fuse panel might have some corrosion. Other than that i guess find as many grounds as i can and clean up em up really good. Hope some of you guys can help or offer some insight as to what you have dealt with! Thanks