Ignition Checks: Spark
- Using an ohmmeter, check resistance of each spark plug wire. See HIGH TENSION WIRE RESISTANCE
table. Check for a strong Blue spark at coil wire and each spark plug wire by holding wire terminal 5/16" ground while cranking engine.
- Disconnect and inspect all related ignition system connectors and harness. Clean or repair as necessary. If okay, remove negative battery cable. Disconnect secondary lead from coil Remove primary leads from ignition coil.
- Using ohmmeter, check resistance between primary terminals of coil. Check secondary resistance between coil secondary terminal and primary positive terminal. Replace coil if readings are not within specifications. See IGNITION COIL RESISTANCE
table.
HIGH TENSION WIRE RESISTANCE
| Application |
Ohms |
| Cabriolet, Golf, & Jetta |
| Coil Wire Only |
* |
| Spark Plug Wire Only |
* |
| Spark Plug Connector |
4000-6000 |
| Suppressor |
600-1400 |
| Fox |
| Coil Wire With Connectors |
1600-2400 |
| Spark Plug Wire With Connectors |
4800-7200 |
| Spark Plug Connector |
14000-6000 |
| Suppressor |
800-1200 |
| Vanagon |
| Coil Wire With Connector |
11200-2800 |
| Spark Plug Wire With Connector |
14600-7400 |
| Spark Plug Connector |
4000-6000 |
| Suppressor |
600-1400 |