Date: Fri, 25 Feb 2000 01:30:11 GMT
From: (eric)
Subject: Re: Starter & electrical system... describe operation?

I had exactly same problem last September, replaced the battery and problem went away. On Thu, 24 Feb 2000 11:20:35 -0500, Scott I. Remick <> wrote: > >Well the problem has never gone away, and in fact seems to be getting >worse. So I need some more help. > >Can someone describe in detail the way the starter works, how electricity >gets to it from the key switch, what goes where, and what happens on the >three post contacts on the starter? As much info as you can supply would >be great... I figure if I can understand it backwards and forwards, I can >maybe figure out eventually what's failing when it happens. > >I have an '84 Saab 900S. Here's what happens: occasionally, you'll go to >start the car and the starter won't budge. You have plenty of >electricity to power every other part of the car (lights come on and so >on), and you'll hear the fuel pump run for a moment, and the clicking of >relays elsewhere... but not a sound from the starter. It SEEMS to happen >more frequently when the car is warm. Let it sit for a while, and it >will start. Sometimes though, even when it DOES start, there's a >abnormal 2-3 second delay after turning the key before you hear the >starter even turn. Maybe this is a hint...? > >When it doesn't start... a second or two after holding the key turned you >start to hear a clicking coming from some device on the left (driver's) >side of the engine compartment. I've located the device, but I don't >know what it does. Other than the fuel pump, these are the only sounds >you'll hear when the car refuses to start. > >I've replaced the starter several times... that's not it. And lately >I've never been able to get it to happen for a service tech. Inevitably, >hauling one down magically causes the car to start up just fine. > >So anyhow... I'm looking for a nice detailed description of how the >starter/ignition operates (especially what happens on those three >contacts and the ignition switch), so I can go at this with a multimeter >and track down the problem. Thanks! > >----------------------- >Scott I. Remick >Network and Information (802)388-7545 ext. 236 >Systems Manager FAX:(802)388-3697 >Computer Alternatives, Inc.

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