J.D. 790 power only on one half of fuse block

[790greene]

I have a 2006 or 2007 J.D. 790 and I have had electrical problems for a while. Took it to the dealer the guy there wasnt able to figure it out, so i thought i would try here to see if others have had this issue. I have power on one half of the fuse block, but not the other. The half with the head and tail light, signals, and warning lights does not work. I have tested the keyswitch and it works. it sends power to the headlight switch, but not sure how to test the headlight switch. Maybe the headlight switch is bad or it could possibly be an electrical relay or something?? i'm not sure. i have the cd repair manual but it doesnt really say how to test the light switch. i have a light switch with turn signals on it too. when i push the button for my warning lights it will light up but the lights dont light up or flash. please help!! thanks for any info you can give me.