'98 ZR2 4x4 trouble

I've read through several of these posts searching for the exact problem I'm having and haven't found anything that completely answers all my questions, so here goes. The 4x4 selector lights do not work at all, not even the 2hi, the interior lights don't work and I think my reverse lights may also not be working. I've checked the interior fuses and everything is fine. I've disconnected the battery and that doesn’t help. I've read about the '4x4 comp' giving others problems. If someone could elaborate on this it would help me out (what to look for and where). I've also considered replacing the actuator with a manual Posi-Lok cable system, but if the problem is at the transfer case this will not help my current problem. Any suggestions would be greatly appreciated.