Used factory manual in good condition.

This Diagnostic Test Procedure covers 1990 Trucks equipped with a 3.9L/5.2L/5.9L Engines with Electronic Fuel Injection.

Contents:

• DRB II Cartridge Diagram
• Connector Pinout/Wiring Diagrams
• Introduction
• General Information
• Diagnostic Test Procedures
• The On-board Diagnostic System
• On-board Diagnostic Features
• Check Engine lame
• The DRB II
• Connecting the DRB II
• DRB II Problems and Error Messages
• Operation of the DRB II
• How to Use the DRB II Volt/ohmmeter
• Using a Digital Volt/ohmmeter for Resistance Measurements
• After the Problem Has Been Found and Repaired
• Required Tools
• Visual Inspection
• No Start Tests
• Driveability Tests

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