Ignition Coil: Testing and Inspection

Coil Testing:

REMOVE OR DISCONNECT
1. Ignition key "OFF."
2. Two electrical connectors from coil.

TEST
^ Ignition coil with ohmmeter for opens and grounds.

^ STEP 1 - Test for short to ground between B+ (to distributor) terminal and ground.
- Use high scale on meter.
- Should read very high (infinite). If not, install a new coil.

^ STEP 2 - Test for open between C-(tach) terminal and C-(to distributor) terminal.
- Use low scale on meter.
- Should read very low or zero. If not, install a new coil.

^ STEP 3 - Test for open between B+ (from ignition switch) terminal and secondary output terminal.
- Use high scale on meter.
- Should not read infinite. If it does, install a new coil.

INSTALL OR CONNECT
1. Two electrical connectors onto coil.