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Ford
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1997
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Explorer 4WD V8-302 5.0L VIN P EFI
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Repair and Diagnosis
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Relays and Modules
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Relays and Modules - Accessories and Optional Equipment
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General Module
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Description and Operation
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GEM Controlled Subsystems
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GEM Diagnostics
GEM Diagnostics
The
GEM
diagnostic system is composed of the NGS tester, the GEM, and all GEM associated components. They allow you to determine if a GEM subsystem has a fault and provides the capability to isolate the fault.