Power Transistor
Check resistance between power transistor terminal "B", ground, and ignition coil negative (-) terminal. If all following checks are not okay, replace power transistor. See Fig 1.
- Connect ohmmeter positive lead (+) to ground and negative (-) lead to "A" terminal on coil. Resistance should be zero ohms.
- Connect ohmmeter positive lead (+) to coil terminal "A" and negative (-) lead to ground. Resistance should be infinity ohms.
- Connect ohmmeter positive lead (+) to coil terminal "A" and negative (-) lead to power transistor terminal "B". Resistance should be infinity ohms.
- Connect ohmmeter positive lead (+) to power transistor terminal "B" and negative (-) lead to coil terminal "A". Resistance should be zero ohms.
- Connect ohmmeter positive lead (+) to ground and negative (-) lead to power transistor terminal "B". Resistance should be zero ohms.
- Connect ohmmeter positive lead (+) to power transistor terminal "B" and negative (-) lead to ground. Resistance should be zero ohms.