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Re: Oil pressure light on w/ key?
Posted by kansas (more from kansas) on Mon, 21 Aug 2006 09:43:23
In Reply to: Re: Oil pressure light on w/ key?, Saabdude Szostkiewicz, Wed, 16 Aug 2006 08:47:27
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"Thanks, that was what I was thinking too... however with the key on, I'm not getting a red light....
guess I'll look at the switch, or the wires (both at the switch and at the idiot light..."
AHA! I have an idea what may well be your problem. I assume that your mechanical gauge is an add-on, not original to the car. (I do not know Sonetts, if they had a factory gauge I could be mistaken.) The mechanical gauge is plumbed to the same port at lower left front of the engine, that the electric switch originally screwed into. Probably the electric switch was eliminated. To restore it, and keep the gauge, you need to re-plumb with a tee down there so both can operate. Any switch for any vehicle that is intended to operate a warning light will work if it has the right threads, 1/8" NPT, they all turn on at around 5-10PSI, so you do not need to hunt for a Saab-specific switch which may be hard to find. It just needs to be a switch for a light, not a variable-resistance sender for an electric gauge. You will probably find the wire for the switch hanging out of the harness down there. If you touch it to ground, key on, the oil light should operate.
One more point: Your gauge is probably plumbed with 1/8" tubing which may be plastic or copper. If plastic, I would replace with copper, the tubing and end fittings (ferrules) are readily available.
posted by 198.69.25...
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