🏷️ Basic Information Identification Make: Jeep Model: Wagoneer Year: 1990 Codes Chassis Code: ZJ (for Grand Wagoneer, but the Wagoneer nameplate was used for the XJ platform at this time, this manual is for the XJ based model often referred to as the 'Cherokee Chief' or 'Grand Cherokee' predecessor in concept, but marketed as Wagoneer) 👋 Introduction Market Position Target Audience: DIY mechanics, independent repair shops, and Jeep enthusiasts seeking in-depth technical knowledge for the 1990 Wagoneer. Competitive Analysis Manual Advantage: Combines two essential manuals (Electrical and Engine/Chassis/Body) into a single, comprehensive resource, offering superior value and convenience compared to single-focus manuals. Searchable and printable format enhances usability. Key Features Searchability: Highly searchable PDF format allows for quick access to specific information. Navigability: Clickable table of contents facilitates easy navigation through the extensive documentation. Visual Aids: Includes numerous photos, exploded views, and diagrams to aid understanding and repair procedures. Durability Of Use: Printable on demand, allowing users to create disposable copies for messy tasks, with the ability to reprint as needed. 📋 Manual Details Coverage Areas Primary Coverage: Engine, Chassis, Body, Electrical Systems Page Count Total Pages: 2221 Manual Type Manual Classification: Factory Service Repair Manual (Combined Electrical and Mechanical/Chassis/Body) Language Language: English Format Digital Format: .PDF 📖 Manual Coverage Systems Covered Engine: Complete engine systems, including disassembly, assembly, diagnostics, and repair procedures for all components. Transmission And Transfer Case: Detailed coverage of both automatic and manual transmissions, as well as transfer case operation, diagnostics, and repair. Driveline And Differentials: Axles, drive shafts, universal joints, and differential gears, including lubrication, adjustments, and overhaul procedures. Suspension System: Front and rear suspension components, including springs, shock absorbers, control arms, bushings, and steering linkage. Brake System: Hydraulic brake systems, including front and rear disc/drum brakes, power assist, parking brake, and ABS (if equipped). Electrical System And Wiring: Comprehensive wiring diagrams, component locations, troubleshooting guides for electrical circuits, lighting, ignition, charging, and accessories. Cooling System: Radiator, water pump, thermostat, hoses, fan, and coolant specifications. Exhaust System: Exhaust manifolds, catalytic converter, mufflers, pipes, and hangers. Fuel System: Fuel tank, fuel pump, fuel lines, fuel injectors, and fuel pressure regulator. Body And Frame: Body construction, panels, doors, windows, bumpers, and frame integrity. Heating And Air Conditioning: HVAC system components, operation, refrigerant handling, and diagnostics. Procedures Included Maintenance: Routine maintenance schedules, fluid checks, lubrication, filter replacements, tune-up procedures. Diagnostics And Troubleshooting: Step-by-step diagnostic trees and troubleshooting guides for common and complex issues across all systems. Component Repair And Rebuild: Detailed procedures for removing, disassembling, inspecting, repairing, reassembling, and installing major components. Alignment And Adjustment: Wheel alignment specifications, steering system adjustments, brake adjustments, and other critical alignment procedures. Body And Trim Repair: Procedures for interior and exterior trim removal, installation, and repair. Technical Depth Depth Of Information: Comprehensive, covering everything from basic maintenance to full engine and transmission rebuilds, including in-depth electrical system diagnostics. 📊 Manual Specifications File Format File Type: .PDF (Portable Document Format) Print Quality Scan Resolution: Scanned original document, implying variable quality but intended for clear readability. Binding Type Digital Binding: Not applicable (digital download). User can print and bind as desired. Paper Type Digital Paper Type: Not applicable (digital download). Printable on standard paper. ⚙️ Engine Specifications Primary Engine Engine Type 1990 Wagoneer: 4.0L Inline 6-Cylinder (242 ci) OHV Performance Horsepower 4.0L: Approx. 177 hp @ 4,700 rpm (specific rating may vary slightly by source for this year) Torque 4.0L: Approx. 220 lb-ft @ 3,200 rpm (specific rating may vary slightly by source for this year) Fuel System Fuel Delivery: Multi-point Fuel Injection (MPI) Ignition System Ignition Type: Distributorless Ignition System (DIS) or distributor-based ignition depending on specific build date and options for the 1990 model year. Manual will cover the variant equipped. 🔧 Transmission Standard Automatic Transmission: For 1990, the primary automatic transmission was the AW4 (Aisin-Warner 4-speed automatic) for the 4.0L engine. Optional Manual Transmission: While less common in Wagoneer trims compared to the Cherokee, a manual transmission (e.g., AX-15 5-speed manual) might have been available or an option. The manual will cover the specific variants fitted. Features Transfer Case Options: Selec-Trac (full-time 4WD) or Command-Trac (part-time 4WD) systems were typically available. 📐 Dimensions Exterior Wheelbase: 108.8 inches (2764 mm) - for the XJ Wagoneer platform Length: Approximately 179.6 inches (4562 mm) - for the XJ Wagoneer platform Width: Approximately 70.0 inches (1778 mm) - for the XJ Wagoneer platform Height: Approximately 65.0 inches (1651 mm) - for the XJ Wagoneer platform Weights Curb Weight: Varies by configuration, but generally in the range of 3,500 - 4,000 lbs (1588 - 1814 kg). 🛡️ Safety Features Ratings Crash Test Information: Specific NHTSA/IIHS ratings for the 1990 model year are not widely publicized for this specific trim/year combination but would generally reflect the safety standards of the era. Manual may contain chassis reinforcement details....