I dont have a diagram for it, but to check all your fuses in both boxes:
With key on, put your meter on DC volts autoscale and touch the little contacts on top of each fuse. If you get voltage anywhere besides the fused ignition, troubleshoot. Mine has less than .5V drop on fused ignition and so have other ZJs I've checked.
What will be doing is checking voltage drop across the fuse. You want the same voltage potential on each side of the fuse, thus no meter reading. Remember you are looking for NO voltage.
If you find a problem, THEN you'll need a diagram