Operation CHARM
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GMC Truck
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1994
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S15/T15 Sonoma P/U 2WD L4-134 2.2L
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Repair and Diagnosis
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Instrument Panel, Gauges and Warning Indicators
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Audible Warning Device
Audible Warning Device
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Description and Operation
Testing and Inspection
Initial Inspection and Diagnostic Overview
Symptom Related Diagnostic Procedures
Audio Alarm Does Not Operate or Stays ON All the Time
Fasten Belts Warning Alarm Does Not Operate
Fasten Belts Warning Alarm Operates When Safety Belt Is Buckled
Key-In Warning Alarm Does Not Operate
Lamps-ON Warning Alarm Does Not Operate
Component Tests and General Diagnostics
Locations
Audio Alarm Module
Buzzer
Diagrams
Diagram Information and Instructions
Abbreviation
Cell References
Electrostatic Discharge (ESD Sensitive Devices)
Schematic Symbols
Wire Color Code Identification
Diagnostic Aids
General Troubleshooting Procedures
Basic Knowledge Required
Basic Electricity
Circuit Components
Circuit Malfunctions
Checking Terminal Contacts
General
Wiring Connector Terminal Replacement
Diagnostic Test Equipment
General
Jumper Wires
Unpowered Test Lamp
Self-Powered Test Lamp
Meters
General
Ammeter
Ohmmeter
Voltmeter
Electrical Diagnosis
General
Finding A Short Circuit or Ground
Intermittents and Poor Connections
Special Tools
Wire Repair Procedures
General
Wire Repair
Solderless Wiring Repair
Weather Pack(R) Connector
General
Weather-Pack Connector Replacement
Metri-Pack Connector
General
Metri-Pack Connector Replacement
Electrical Diagrams
Description and Operation
Testing and Inspection
Locations
DiagramsDescription and OperationTesting and InspectionLocationsDiagrams