Back in the day of our 88 XJs AMC did manuals different. They did engine, trans, fuel enjection, etc in different manuals. They still should be available from Techauthority, just give them a call on the 800 number. here some of the title for the others:
* 8980 010 422 MOT. I-6 Component Service Manual, 4.0/4.2L Six-Cylinder engine
* 8980 010 547 INJ. MPI Component Service Manual, Multi-port Fuel Injection (MPI) Systems
* 8980 010 426 T.A. AW-4 Component Service Manual, AW-4 Automatic Transmission
* 8980 010 378 T.C. 231 Component Service Manual, Transfercase 231
* 8980 010 613 Electrical Troubleshooitng, 1988 Cherokee/Wagoneer USA/Canada Edition
The Electrical troubleshooting manual is like $20 and worth EVERY penny. The other manuals are $10 or less if I recall. Just call Techauthority during business hours and order them, also order a new owner's manual they are $6. If you order them all the fright will be quite resonalbe compaired to buying each one seperately.