Date: Mon, 06 Nov 2006 02:41:27 -0500
From: "hippo" <>
Subject: Re: weird turn signal problem (c900)

John B wrote: >Hi, >I have an interesting problem here, from my 1992 900. The left turn signal >behaves erratically, but only when the headlights are on. By "erratic," I mean >that it flashes very slowly or not at all. Or it will flash once and stop, and >then randomly flash once every several seconds, etc. Also, when I flip the turn >signal off, the dashboard left-arrow indicator continues to glow faintly. >All this is only when the headlights are on. The left turn signal and 4-way >flashers function normally. >After looking at the wiring diagrams, I think the most likely trouble spot is >the left rear light cluster. The turn signals and parking lights share a ground >point there, and I've had some problems there before with the brake lights and >reverse lights. (note: this is a 4-door) >Any other ideas? >Thanks, >John I'd say you've got it in one - earth (ground) problem. The rear light pcb has a common earth track for everything and on every 900 I've owned it's caused similar problems. Quite often it leaves you with just about every rear light half illuminated while the one you actually needed isn't doing much at all! Try this quick and ugly fix that's never failed me for anything up to 7 yrs & 200,000Km (and anyway it's behind the carpet, soo....) Take the lhs pcb out as far as you can then - no need to fully remove it from the car, you just need access Drill a 1/8 hole in one of the fatter bits of the ground track Get a piece of cable about 90cm/3ft long and solder or crimp a round teerminal to each end Bolt one connector to the pcb and the other one to the brace in the rear centre of the back panel where the other earth cables live. It's near the velcro button that the floor grips onto Hope that fixes it, but if it doesn't, at least you haven't wasted much time or money! Cheers

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