Operation CHARM: Car repair manuals for everyone.

Visual Inspection

This inspection will identify modifications or additions to the vehicle operating system that may affect diagnosis. Inspect vehicle for non-Ford approved add-on devices such as:
- Electronic add-on items
- air conditioning.
- generators (alternators).
- engine turbos.
- cellular telephones.
- cruise controls.
- CB radios.
- linear amplifiers.
- backup alarm signals.
- electronic brakes for trailer towing
- computers.
- Vehicle modifications.

These items, if not installed properly, will affect powertrain control module or transmission function. Pay particular attention to add-on wiring splices in the powertrain control module harness or transmission wiring harness, abnormal tire size or axle ratio changes.

Leaks refer to "Leakage Inspection".