<~ cringes at the mention of 'Haynes' manual. Perhaps this isn't the case on their manuals for Jeep, but for other vehicles, I've noticed such elemental errors as order of operations not 'in order'. If you can, beg, borrow or steal the manufacturer original Jeep Service manuals.
With regard to insturment illumination I had similar issues when I first got 'Betty' ('78 CJ5) but using the offficial manuals I noted that they all tie into the same circuit and since they're not pulling many amps I was able to tie them together and link to the approapraiate fuse. Hope your path is as easy!