Should I rewire the whole car?

[David T]

You do not rewire a whole car unless the wiring harness is burnt. Tackle the problems one-by-one and fix them. Some may have common causes. Once you get things going the fuseblock is replaceable without having to replace the harness. Typically it is not the wires themselves that cause the problems, it is the connectors on the ends. They can be replaced if necessary.
David Teitelbaum

[Jonathan]

These will perhaps also help you in your troubleshooting:

http://dmctalk.org/showthread.php?40...ing-Schematics

Towards the bottom at post 6 is the fuse and relay area sketch which at the very least could be used to check if you have the right fuses in each location and a number of other things you can compare your car to the way the original design was.