- Disconnect the negative battery cable.
- Unplug the two electrical connectors from the coil
- Using an ohmmeter, check the ignition coil as follows:
Test for short to ground between B+ (to distributor) terminal and ground.Use the high scale on the meter, should read infinity (open circuit).
See Figure 1
Any reading other than infinity means the coil is bad and needs replacing
Test for open circuits between C-(tach) terminal and C-(to distributor) terminals.This test is for continuity. Reading should usually be less than 5 ohms (on the low scale). If not replace the coil.
Test for an open between B+ (from the ignition switch) terminal and secondary output terminal (coil wire terminal).Read the high scale on the meter. Should have some resistance, (about 7K ohms) should not read infinity; if it does, install a new coil.
- Reconnect the two electrical connectors onto the coil.
- Connect the negative battery cable.
REMOVAL AND INSTALLATION
- Disconnect the secondary lead (coil wire). Twist the boot 1 / 2 turn each way, while tugging on the boot. Do not pull on the wire.
- Disconnect the primary electrical connectors (do not pry on latch/lock with a screwdriver, as it may break).
- Remove the ignition coil mounting screw and nuts.
- Remove the ignition coil.
See Figure 2
- Install the screws and nuts to secure the coil.
- Reconnect the primary electrical connectors. Assure that they are fully seated and latched.
- Install the secondary lead (coil wire). Make sure it is fully seated and secured on the coil tower.