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

Spark Plug Wire Inspection




^ Inspect the spark plug wires for the following conditions:
- A bent or a broken terminal
- Corrosion or moisture contamination
- Loose or poorly fitting terminals
- Boots for cracks or punctures
- Boots for carbon tracking
- Cable and boot for abnormal swelling or stiffness
- Cable for damage
^ Measure the electrical resistance of the spark plug wire (2) with a DMM (1). Resistance must not be more than 4-10 k ohm/m (1.2-3.0 k ohm/ft).
^ Replace any spark plug wire that fails an inspection or a test.