Positioning:
The Ferrari 328 GTB/GTS represents a peak in front-engine V8 Ferrari design, bridging classic styling with developing automotive technology. This wiring diagram is essential for owners and specialists maintaining these iconic Italian exotics.
Comparison:
Compared to its contemporaries like the Porsche 911 Carrera (930) and Chevrolet Corvette C4, the 328 offered a more sophisticated driving experience and distinctive Italian flair, albeit at a significantly higher price point. Accurate electrical documentation is paramount for preserving its performance and originality.
Features:
Focus on detailed electrical system schematics vital for diagnosis and repair of complex Italian automotive electronics. This manual is a critical tool for maintaining the car's original functionality and performance characteristics.
Coverage:
Comprehensive electrical system diagrams for Ferrari 328 GTB and GTS models produced in 1989.
Page Count:
Estimated 80-120 pages (typical for this era's Ferrari wiring diagrams).
Type:
Wiring Diagram Manual / Electrical Service Manual Supplement.
Language:
English (typically original Ferrari documentation is in Italian and English).
Electrical Systems:
Engine management, fuel injection, ignition, lighting (headlights, taillights, indicators, interior), instrumentation, power windows, power mirrors, wipers, horn, HVAC controls, ABS (if equipped), central locking, starter system, charging system, audio system wiring.
Lighting System:
Detailed wiring for headlights (high/low beam), taillights, brake lights, turn signals, hazard lights, interior dome/courtesy lights, and dashboard illumination.
Instrumentation System:
Wiring for all gauges (speedometer, tachometer, oil pressure, water temperature, fuel level, voltmeter), warning lights, and indicator lamps.
HVAC System:
Electrical controls for ventilation, fan speed, and temperature selection for the climate control system.
Diagnostic Procedures:
Fault finding based on circuit diagrams, component location referencing for connectors and grounds.
Component Location:
Diagrams illustrating the location of major electrical components, fuses, relays, and ground points within the vehicle's chassis and engine bay.
Wiring Harness Identification:
Tracing of main wiring harnesses and identification of specific circuits within them.
Depth:
Detailed circuit schematics, component identification, wire colors, connector pinouts, fuse and relay assignments, ground point locations.
Fuse Relay Specification:
Accurate amperage ratings for all fuses and relay types used in the electrical system.
Wire Color Coding:
Precise identification of wire colors used in each circuit, crucial for accurate tracing and repair.
Connector Pinouts:
Detailed diagrams showing the pin assignments for various electrical connectors throughout the vehicle.
Engine Type:
90° V8, Mid-engine, Rear-wheel Drive.
Displacement:
3185 cc (3.2 Liters).
Horsepower:
270 hp (201 kW) at 7000 rpm.
Torque:
298 Nm (220 lb-ft) at 5500 rpm.
Fuel Injection:
Bosch KE-Jetronic Fuel Injection (K-Jetronic with electronic control).
Ignition System:
Magneti Marelli Electronic Ignition.
Bore X Stroke:
83 mm x 73.6 mm.
Compression Ratio:
9.2:1.
Safety Ratings:
No formal crash test ratings available from modern agencies due to the era and low production volume.
ABS:
Optional Anti-lock Braking System (ABS) available on later models, including 1989 production.
Brakes:
Ventilated disc brakes front and rear.
Seatbelts:
3-point inertia reel seatbelts.
Chassis Construction:
Steel monocoque with tubular steel subframes.
Infotainment System:
Basic analog instrumentation, typically a high-quality period radio/cassette player (e.g., Blaupunkt or Becker).
Driver Assistance Features:
Optional ABS. No electronic stability control or traction control systems.
Connectivity:
N/A (No integrated Bluetooth, USB, or smartphone connectivity).
Oil Change Interval:
Typically every 5,000-7,500 km (3,000-5,000 miles) or annually.
Major Service Interval:
Timing belt replacement every 30,000-50,000 km (20,000-30,000 miles) or 5 years, whichever comes first.
Engine Oil Type:
API SG or SH, SAE 10W-50 or 15W-50 (check specific owner's manual for Ferrari recommendations, often synthetic blend or full synthetic.
Engine Oil Capacity:
Approximately 11.0 Liters (2.9 US Gallons) with filter.
Coolant Type:
Ethylene Glycol based antifreeze, typically a 50/50 mix with distilled water.
Brake Fluid Type:
DOT 3 or DOT 4.
Transmission Fluid Type:
API GL-4 or GL-5, SAE 75W-90 or 80W-90 gear oil (e.g., Castrol Syntrax Universal).
Common Issues:
Degradation of fuel lines and connectors, aging of electrical components and insulation, timing belt tensioner reliability, clutch wear, exhaust system corrosion, potential carburetor or fuel injection tuning issues.
Electrical Issues:
Corroded connectors, failing relays, intermittent faults in lighting and dashboard due to age and heat cycles. The wiring diagram is crucial for diagnosing these.
Example Part Number Need:
Specific part numbers for components (e.g., ignition coils, fuel injectors) would be found in a full parts catalog or detailed service manual, not typically in a standalone wiring diagram. However, wire colors and connector types are key to electrical parts.
Heritage:
Ferrari's legacy of producing high-performance sports cars, renowned for their racing pedigree and Pininfarina styling.
Evolution:
The 328 GTB (Berlinetta) and GTS (Targa top) were the evolution of the 308 GT4 and 308 GTB/GTS. The 328 introduced a larger displacement engine and styling refinements.
Production Years:
1985-1989.
Production Numbers:
Approximately 6063 units produced (combined GTB and GTS).
Manufacturing Location:
Maranello, Italy.
