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

Coil Secondary Test


1. Disconnect high tension lead from coil, and connect an ohmmeter between high tension tower and negative terminal on coil.
2. Resistance should measure 8,200-12,400 ohms on models with external IC unit and Stanza models with internal IC unit, 8,000-12,000 ohms on 1984-86 200SX models with internal IC unit, or 7,300-1 1,000 ohms on all other models with internal unit
3. If resistance is not within specification, replace coil.