Pre 84 Trucks 1st gen pickups

22R igniter 1.5v test

Old 05-17-2019, 09:00 PM
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22R igniter 1.5v test


'83 4x4. No sparky. Working through the factory tests. With ignition ON, getting 12v to the brown wire and 12v from the yellow wire (with brown connected) as expected.

However, the next test is to disconnect the pink and white wires from the distributor, hook a 1.5v (AAA) battery to them (for no more than 5 seconds), and check for 8-10v coming from the igniter at the yellow wire when the ignition is ON.

Well, I'm getting 12v from the yellow wire constant, even before the battery is hooked up and it doesn't change with the addition of the battery. Is this positive identification of a problem with the igniter? The test is stated to be of the "power transistor" and it doesn't seem like there's any transisting going on.

I already have the GM module on hand ready to adapt...
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Old 05-21-2019, 12:05 AM
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I swapped in the GM igniter and it runs.
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Old 05-21-2019, 11:19 PM
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That sounds pretty similar to the results that I got when mine went bad. If it runs with the GM, I'd say you found your culprit.
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Old 05-22-2019, 03:55 AM
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Any photos of the GM igniter retrofit?
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