Ignition Coil Resistance Check
- Turn ignition switch "OFF". Remove coil wires. Using an ohmmeter set at the low scale, attach leads to ignition coil primary terminals 1 and 15 (wires removed). See Fig 1 . Take primary resistance reading.
- The coil has a pressure relief plug located on top of the coil. Make sure the plug has not popped out. If it has popped out, replace coil.
- Set ohmmeter to x1000 scale. Connect ohmmeter leads to negative terminal 1 and coil tower terminal 4 (high tension). Take secondary resistance reading.
- If either the primary or the secondary reading was not within specifications, replace coil.
IGNITION COIL RESISTANCE SPECIFICATION
| Application | Primary | Secondary |
|---|---|---|
| Mercedes-Benz | .7 | 8000-11,000 |