This manual only consist wiring diagram of the 328 GTB and 328 GTS (hardtop) of Ferrari model year 1989, not the complete workshop/service manual of 328 GTB/328 GTS. The 328 GTS/GTB owners manual, 328 GTS/GTB technical specifications and 328 GTS/GTB workshop manual also available.

Inside this wiring diagram:

Main Box - Fuses and Relays
Cables Color Codes
Alternator - Starter Motor
Fuel Injection System
Ignition
Windscreen wiper and washer - Horns - Current Socket
Controls and Displays
External Lights and Controls
Radio - Doorglass winders - Door Locking actuators - Interior Lights - Cigarette Lighter
Heating System - Air Conditioning System
ABS System