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, Sun, 11 Jan 2004 18:11:38
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Inga,
Hi there.
As JohnK said, use the outer wires (yellow and black) from your seat's 3-prong plug to connect to the 2 wires coming from the car. You don't need to use the middle (blue) wire of the 3-prong plug if you want a simple on/off arrangement.
You and I have been in the same boat as far as seat heaters are concerned. I, too, have an older 900 (1984). The previous owner had replaced the worn driver's seat with a newer 900 seat, one that needed the newer-style, dash switch-controlled seat heater (which my car didn't have). The "new" seat was simply bolted in my car, with seat heater wiring left disconnected (because, like your car, the new seat has 3-wire plug and the car's wiring has 2-wire plug).
My "new" seat has 3-prong plug with two blue wires crimped into center prong, a yellow wire on one outer prong, and two black wires crimped together for the other outer prong. Car's 2-wire plug has one black wire, one yellow. (I didn't see any green wires on mine anywhere near the seat.)
As a temporary solution, I connected the yellow wire from my seat to the yellow wire from the car's 2-wire plug. Then, I connected the black wire of the seat to the black wire of the car's 2-wire plug. I simply used a rocker switch spliced in one wire of the circuit for an on/off control. I also used "spade lug" connectors so I could remove the seat without cutting the wiring (meaning I did not splice seat wires directly to car wires).
That worked OK for a while...
Being an incessant tinkerer, I hated the thoughts of having the dash-controlled seat heater but no way to use it, so I decided to locate a good SAAB seat heater dash switch (3-position) and hook it up to my car by using my Bentley wiring diagram to show the way.
After a good bit of thinking it through, I finally figured it out and got it working. Now I have 3-position dash-controlled seat heatr in my twenty year-old SAAB!
So, it CAN be done, if you've got some spare time, some (approx.) 16 guage insulated wire, and some basic electrical tools (like wire stripper/crimper/cutter, electrical tape, and zip-ties). I can help guide you through it if you want to attempt it.
On the other hand, you might be satisfied that easy on/off switch instead.
Micah in NC
'84 900S, 249K mi.
posted by 65.80.14...
, Sun, 11 Jan 2004 11:08:51, Sun, 11 Jan 2004 11:32:01, Mon, 12 Jan 2004 17:27:53, Sun, 11 Jan 2004 18:11:38
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