Misc Fuses???

[zirk]

Ok, so long story short, my truck hasn't been running, after a new steering column (out of a junk yard), and endless hours of checking wiring.. i found some fuses that seem to have been added in. They're located by the starter moter, (pics below)... One of them was blown, we replaced it and after a few tries the truck fired right up, after about a minute it shutoff nothing works but the lights (i assume the fuse blew). It's too dark to see anything now, so it sits till tomorrow.. Anyone dealt with anything like this? Also, the heater fan doesn't want to shutoff

Any advice will be greatly appreciated.