🏷️ Basic Information

Make:

Chevrolet

Model:

Superior

Model Variant:

Chevy

Year:

1923-1926

Product Code:

CHEV-1923-26-WIRING

👋 Introduction

Target Audience:

Owners, restorers, mechanics specializing in vintage Chevrolet vehicles.

Essential Tool:

Indispensable for diagnosing and repairing any electrical issue on these early Chevrolet models.

Restoration Aid:

Crucial for accurate wiring harness reconstruction and electrical system verification during restoration projects.

📋 Manual Details

Primary Focus:

Electrical System Wiring Diagrams

Included Models:

All Chevrolet Superior models (Series AA, AB, AC, AD)

Estimated Page Count:

50-75

Type:

Wiring Diagram Manual / Electrical Service Manual

Language:

English

Format:

Digital (PDF)

📖 Manual Coverage

Electrical Components:

Ignition system, lighting (headlights, taillights, cowl lights, dome light), starting system, charging system (generator, battery), horn, fuel gauge, oil pressure gauge, ammeter, switches, wiring harnesses, fuse/circuit breaker locations.

Troubleshooting:

Diagnosis of electrical faults, testing of components, identification of wiring issues, interpretation of circuit diagrams.

Repair Guidance:

Guidance on wire splicing, terminal replacement, component replacement specific to electrical systems.

Depth:

Detailed circuit diagrams, component identification, wire color codes, terminal identification, and connection points. Focuses on understanding and repairing the electrical system's integrity.

📊 Manual Specifications

Digital Format:

Searchable PDF

Scan Quality:

High-resolution scans of original diagrams, ensuring clarity of lines and text.

Binding:

N/A (Digital Format)

Paper Type:

N/A (Digital Format)

⚙️ Engine Specifications

Engine Type:

Inline 4-Cylinder (Overhead Valve)

Displacement:

Approximately 171 cubic inches (2.8 liters)

Horsepower:

Approx. 20-28 HP (depending on year and specific tune)

Carburetor:

Single Barrel Carburetor (e.g., Zenith, Stromberg)

Ignition Type:

Battery and Coil Ignition with Distributor

🔧 Transmission

Transmission Type:

3-Speed Manual Transmission

Gearbox Design:

Sliding gear type, center shift (in later models), sometimes floor shift.

📐 Dimensions

Wheelbase:

Approximately 103 inches to 113 inches (depending on body style and year)

Curb Weight:

Approx. 2,000 - 2,500 lbs (depending on body style)

🛡️ Safety Features

Safety Standards:

Pre-NHTSA era; safety features are rudimentary by modern standards.

Braking System:

Mechanical Drum Brakes on all four wheels (later models may have improved mechanical linkage).

Lighting System:

Inadequate by modern standards, typically incandescent bulbs. Diagram clarity is crucial for ensuring functionality.

💡 Technology Features

Radio:

Optional AM Radio (often a dealer installed accessory, separate wiring diagram may be needed for specific installations).

Driver Aids:

None by modern definition. Turn signals were not standard, often hand signals or aftermarket additions.

Connectivity Features:

N/A

🔧 Maintenance

Tune Up:

Recommended every 2,000-3,000 miles or annually. This includes ignition timing, spark plug gap, carburetor adjustment. Wiring inspection is vital during tune-ups.

Engine Oil:

SAE 20W or SAE 30 (non-detergent) depending on ambient temperature. Capacity approx. 4 quarts.

Transmission Oil:

SAE 90 Gear Oil. Capacity approx. 2 quarts.

Brake Fluid:

N/A (Mechanical Brakes - lubrication for linkages).

Coolant:

Water (traditional), or water with anti-corrosion additive. Antifreeze use is debated for older engines but essential in freezing climates.

Electrical Reliability:

Deterioration of fabric-wrapped wiring insulation, brittle insulation, loose connections, generator output issues, starter motor problems. This manual is key to addressing these.

Ignition System:

Worn distributor points, condensers, spark plug wear, coil failure. Accurate wiring ensures proper signal flow.

Wiring Harness:

Replacement requires careful replication of original layouts and connections as per the diagrams. Color coding is critical.

📚 Vehicle History

Chevrolet Legacy:

Chevrolet was established as a value-oriented marque by General Motors, offering reliable transportation.

Superior Series:

The 'Superior' designation encompassed various body styles (Touring, Coach, Coupe, Sedan) and saw incremental updates through the mid-1920s, including engine refinements and styling changes.

Production Period:

1917-1927 (Superior series dates).

Manufacturing Location:

United States (various GM plants)

🏆 Awards & Recognition

Historical Significance:

The Chevrolet Superior series was a popular and significant model in the early automotive industry, contributing to GM's market dominance.