I'm not sure. Let me check the parts catalog real quick and see...
FYI, you can simply eliminate it if it's the problem. I eliminated the one on my 91 and it's been working fine, all it does is reduce fuel pump noise and since it's an MJ I could barely hear it anyways.
EDIT: There doesn't seem to be one in the 94-96 parts catalog anywhere in the electrical section. So yeah, I think 93 is the last year for the ballast resistor.