These might come in handy:
Nissan 240SX / Silvia Factory Service Manuals Totally free pdf format files.
http://www.nicoclub.com/archives/nissan ... nuals.html
S13: 1989 – 1994
1989
1989 CA18DET Electrical Manual
1990
1990 S13 Facelift Supplement
1991-1994 General FSM
1991
1992
1992 180sx Digital Climate Control
1993
1994 – See 1993 and Convertible Supplement
1992-1994 240sx Convertible Supplement
S13 Body Repair Manual
S13 Wiring
KA24DE Manual
SR20DET Manual
CA18DET Manual