July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

Ignition Coil

Individual component testing is not available from manufacturer. For ignition coil control circuit testing, see ignition coil related diagnostic test. See the following:

On 4.7L, see DIAGNOSTIC TROUBLE CODE DEFINITIONS in SELF-DIAGNOSTICS - DURANGO - 4.7L article.
On 5.9L, see DIAGNOSTIC TROUBLE CODE DEFINITIONS in SELF-DIAGNOSTICS - DURANGO - 5.9L article.