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

Ignition Ballast Resistor

Series Resistors


Series resistors 0.4 ohms and 0.6 ohms are assembled like the ignition coil resistors used before: A ceramic body encloses the resistance winding, with extending connections.


A sheet metal clamp is placed around ceramic body for fastening. The color of this clamp provides information about the resistance value which is additionally punched in as a number.


Color - Code Number Resistance

blue, anodized - 0.4 0.4 ohms
metallic, anodized - 0.6 0.6 ohms








1. Cable connector
2. Switching Unit TSZ 4
3. Series resistor 0.6 ohms
4. Series resistor 0.4 ohms
6. Ignition coil