Site News - 11/22 Member of the Year Voting
Date: Thu, 20 Apr 2006 22:23:45 +0000 (UTC)
From: Craig's Saab C900 Site <c900nospam.apana.org.au>
Subject: Re: Wiring Smoked From Inside Dashboard. Here's what Happened..


"markcnospam.com" <markcnospam.com> writes: >That's exactly what I figured must have happened. I forgot to mention >that it is a '89 900. I'll have to look at the wiring diagram to see >if there is a starter relay. If there isn't one installed then it was a >mistake not to design the car without one. Well not really - in good condition the starter is never engaged long enough to cause problems. The starters themselves are only rated to run for up to 30 seconds before they need to be turned off to cool down. The current those armatures draw is serious stuff and all that energy gets dissipated into a very small volume of metal. But I noticed that my c900's all have an auxilliary relay which appears to have been a Saab modification. Interestingly my 1983 8V turbo car (had the engine running yesterday - yay - but there is a strange oil leak which burns from under the exhaust manifold somewhere when the engine is going) does not have an auxilliary relay. Also it still has the old style fuel sender (white plastic case), and the fuel-pump wiring has the old config with the earth for both the pump and sender running off the same terminal on the sender. I think that's one reason the old senders got replaced with the more modern type. I have not had a problem with any of the starter wiring in the turbo car so far. But when I have been trying to solve engine problems (it had a lot of problems starting when I first got it), I'd always leave it for a minute or two after a long crank both to cool the starter and wiring, but also to allow the battery to recover a bit. Regards, Craig. -- Craig's Saab C900 Page at | Craig's Classic Saab Workshop - Sydney .au http://lios.apana.org.au/~c900 | http://www.classicsaab.net and other URL's Email: c900nospam.apana.org.au | For Saab 99/C900/9000 Enthusiasts World-Wide! Alternate: saabonautnospaml.com | Web-forums, galleries, library, links, etc.

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