89 Econoline Van Won't Start

I've replaced the battery, the starter and the starter relay. Will not start when I turn the key over. It does click, but that's it. I can start it by bypassing the starter relay.. I'm stumped.

Also, does anyone have or know where I can find online the fuse box diagram?

Thanks

check ignition switch under steering column. the small wire going to the relay should have battery voltage when you turn the key to start and 0 volts in all other positions