Date: Thu, 31 Aug 2006 11:58:53 +0000 (UTC)
From: Craig's Saab C900 Site <>
Subject: Re: Last Chance for My '85 900

CMM <> writes: >On Sun, 27 Aug 2006 00:03:49 +0000 (UTC), Craig's Saab C900 Site ><> wrote: >>Yeah well I've only got one significant wiring faults in my 85 900i and >>that's with the +12 volt line to the warm-up reg and auxilliary air valve. >>So that engine runs really slow after starting but is fine after warming >>up. The wires to the AC high-temp cutout switch are also really bad - almost >>bare copper at the ends that join to the the female spade lugs which plug >>onto the thermo-switch itself. 8-) But that'll be simple to fix when I get >>some auto-rated wire of the right gauge, or just 'borrow' some out of the >>wiring harness in the 83 GLi that's my current 'donor' car. >I've wondered if some of the problems I'm having are due to a wiring >fault. I have one harness where every wire was bare copper. I taped >the individual wires as best I could to prevent shorting but that >didn't seem to help. >Not too sure how I would track something like that down unfortunately. Best way is to use a schematic diagram of the wiring, and where you have suspect wires, work out where each wire connects to something, or joins into a connector, and do continuity checks, etc. That's how I worked out the wiring issue with the 85 900i. It can be very tedious if you're tracing a lot of wires, but in general, all the wiring in the engine bay is going to degrade much faster than elsewhere, but if your car doesn't have an exhaust shield under the floor the wiring running down the centre can also cook (and in one recent case I saw on a forum site, short and start a fire!). Also keep an eye on the rear light cluster wiring as that's a common place for water to get into the electrics. Craig. -- Craig's Saab C900 Page at | Craig's Classic Saab Workshop - Sydney .au | and other URL's Email: | For Saab 99/C900/9000 Enthusiasts World-Wide! Alternate: | Web-forums, galleries, library, links, etc.

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