lawsoncl said:
You didn't say which year, but I will agree with those who mentioned the older Jeep Renix-era FSMs are pretty thin. Later years, the FSM is about the size of a thick phonebook and pretty detailed. I have a 95 FSM that I got for my YJ that I refer to quite often for both my 89 MJ and 93 ZJ as many things didn't change. For example the FSM was perfect for rebuilding the AX15 tranny since it was relatively unchanged. Search eBay. Plus what you can't find in an FSM you can probably find here somewhere.
The only reason a RENIX-era FSM seems thin is because it comes in volumes - one for mechanical, one for electrical, and some very thin "supplements" (ABS, some transmissions, &c.)
The RENIX-era ChryCo-printed FSM is equivalent to the later FSMs, it just covers multiple models (since many systems are shared) and it's just as detailed.
The AMC-printed FSMs are a bit thicker, organised differently, and take a bit more to understand. They're also loose leaves (vice bound,) and about five inches thick - I have a couple.
The Chilton's is a nice beginner's manual, and I really do miss the old Clymer's manuals. You can usually find Motor or Mitchell manuals in the Reference section of your local library, and they sometimes have Chilton's for checking out.
And, if you can't find the FSM for your specific year, there are "brackets" I've noted that can help things for you...
1984-1986 XJ and 1986 MJ
1987-1988 XJ and MJ
1991-1995 XJ and 1991-1992 MJ
1996 XJ (this was a transition year)
1997-1999 XJ
2000-2001 XJ
Work within those brackets, and it should be simpler for you. They're broken down to major electrical changes and revisions (RENIX was 1987-1990, OBD-I from 1991-1995, OBD-II from 1996-up. 1996 was the first year of OBD-II and the last year of the "old" body style, which is why it's listed as a "transition" year. 1984-1986 are "pre-RENIX.") There were some small electrical changes between 1988/1989 coincident with ChryCo taking over production - mostly changes to wiring colours (the information in the manuals will cross, but you have to trace wires out manually to convert colours about half the time.)
The reason for the 1999/2000 break was the introduction of the Coil On Plug (COP) ignition setup - it was actually introduced in 1999 on the WJ and TJ.
HTH. YMMV. TANSTAAFL.