Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

Visual Inspection

This inspection will identify modifications or additions to the vehicle operating system that can affect diagnosis.

Inspect vehicle for non-Ford approved add-on devices such as:
- air conditioning.
- generators (alternators).
- engine turbos.
- cellular telephones.
- cruise controls.
- CB radios.
- linear boosters.
- backup alarm signals.
- computers.

Inspect for:
- 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
- proper linkage adjustments