A pal who 'fixes cars' has a problem with a Cavalier. Don't know the age or model. It appears it has no spark.
It has a conventional - although weird looking distributor for one used to old Lucas - with some form of electronic ignition. The connector to the trigger in the distributor has three contacts. There is an ignition amplifier mounted under the coil. The coil shows battery voltage on both positive and negative at all times - even when cranking. He says. He's tried replacing both distributor and amplifier with secondhand components, and again says he's had them tested, and they're fine.
He's given me both distributors and asked me to test them. I've got all the usual electronic test gear including a decent 'scope. Anyone know what type the trigger is to save me some time better spent on getting the SD1 back together? ;-)