Re: Starter Gremlins - Saabnet.com Bulletin Board
There should be power all the time to the main post on the solenoid - I believe it comes directly from the battery (it does on all other cars from the early 70's I've worked on). Such weird behavior with a starter has, in my experience, been traced to a bad battery ground. So I'd start there - make sure the ground to the chassis back by the battery is good before getting too much deeper in the mire. There's so little to go wrong with the solenoid. If it has reliable power of close to 12v, it will fire and engage the starter, or at least you'll get a click.
The next thing I would try (after checking the ground) is to wire up a remote starter button and see how that behaves - this would take the ignition switch out of the mix and if everything works as expected then you can begin to question the ignition wiring.
posted by 66.69.20...
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