Pinpoint Test F : Generator Noise Or Mechanical Performance: Notes

Diagnostic Overview 

Diagnostics in this service information assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Service Information for more information.

Refer to CHARGING SYSTEM for schematic and connector information.

Normal Operation and Fault Conditions 

The generator is belt-driven by the engine accessory drive system. Generator noise may be caused by bearing noise, electrical fault noise, generator or belt pulley misalignment. A generator with certain types of diode or stator failures can also produce an audible noise.

Possible Sources 

• Inspect the FEAD belt.
• Inspect for loose bolts/brackets.
• Inspect the generator/pulleys.

Visual Inspection and Diagnostic Pre-checks 

• Inspect the FEAD belt.
• Inspect for loose bolts/brackets.
• Inspect the generator/pulleys.