How to engage my four wheel drive

Are both low and high out?

Both hi and low out.My interior fuse box cover is missing so I can't tell which fuse is for the 4 wheel drive. Hopefully it's something that simple. I have no owners manual either.

Try Googling the owner's manual. I would hate to guess what might be wrong with yours, but from what I remember about my '92 (a long time ago), it was a solenoid or sending unit or something?? Not a real expensive repair. Best of luck.