I was working for Dodge at that time, if all the fuses are good then I would suspect a broken wire, between the fuse box and the joy stick; and here is where memory fails me.
Is the joy stick in the dash or in the door ? The door type wiring harness was prone to breaking in the flex area between the door hinges. The joystick also requires a good ground. I'll dig around if I find a wiring diagram I'll re-post.
99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.