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Car Forum / Saab Cars / February 2005Heated Seat Question
My heated Front Driver's seat died on me today.(85 900T) Hopefully it's not an omen. Just curious how I'd go about troubleshooting the problem. The passenger seat still works, so I don't think it's a fuse. Any guesses? It just went out for no reason.. I've been using it a bit lately since it's been cold, but no problems with it. Any help would be most appreciated. Thanks! -Larry > My heated Front Driver's seat died on me today.(85 900T) Hopefully it's not > an omen. Just curious how I'd go about troubleshooting the problem. The > passenger seat still works, so I don't think it's a fuse. Any guesses? It > just went out for no reason.. I've been using it a bit lately since it's > been cold, but no problems with it. Any help would be most appreciated. Start by checking for voltage at the seat with the switch on, if it's present, then remove the seat and go from there. I haven't yet pulled apart a Saab seat, but the usual problem with Volvo seat heaters is that the wire breaks off at the thermostat under the upholstery, not hard to fix once you figure out how to get it apart. Could be something as simple as the seat occupancy sensor if it has one. Oddly enough. I don't think there's an occupancy switch. The passenger seat comes on(at least the light does) whenever I flip the switch. >> My heated Front Driver's seat died on me today.(85 900T) Hopefully it's > not [quoted text clipped - 13 lines] > figure out how to get it apart. Could be something as simple as the seat > occupancy sensor if it has one. > Oddly enough. I don't think there's an occupancy switch. The > passenger seat comes on(at least the light does) whenever I flip > the switch. True. My passenger seat will get hot with nobody sitting there. Doesn't seem like a good idea, but I guess Saab figured you oughta be responsible enough to turn it off when you're not using it. > > Oddly enough. I don't think there's an occupancy switch. The > > passenger seat comes on(at least the light does) whenever I flip [quoted text clipped - 3 lines] > Doesn't seem like a good idea, but I guess Saab figured you oughta be > responsible enough to turn it off when you're not using it. There is usually a spring-switch under the seat, operated by the weight of the passenger to prevent this happening. Check it hasn't been stretched, so it is always ON.  SignatureRichard Sutherland-Smith 19 Webb Road, Wanganui 5001, New Zealand >> True. My passenger seat will get hot with nobody sitting there. > There is usually a spring-switch under the seat, operated by the > weight of the passenger to prevent this happening. Check it hasn't > been stretched, so it is always ON. Um, I'm not quite sure how to. And it seems unlikely, as the car is only 2.5 yrs old. A large percentage of the time nobody's in the passenger seat. Gary > >> True. My passenger seat will get hot with nobody sitting there. > > There is usually a spring-switch under the seat, operated by the [quoted text clipped - 6 lines] > > Gary What car is it? If it is young enough it should have a dash switch, then you can switch it off. SignatureRichard & Mary Sutherland-Smith 19 Webb Road, Wanganui 5001, New Zealand > What car is it? > If it is young enough it should have a dash switch, then you can > switch it off. It's a 2002 9-5 Aero, and it DOES have a dash switch. (Don't all models with seat heaters? Otherwise it'd be boiling your butt all summer.) But James and Richard both indicate at least some models have an occupancy switch as well. > > What car is it? > > If it is young enough it should have a dash switch, then you can [quoted text clipped - 6 lines] > But James and Richard both indicate at least some models have an > occupancy switch as well. Most of them should, or a good in-seat thermostat, otherwise it could burn up if left switched on with nobody in the seat, I saw an old Volvo seat once that had the foam badly burned and melted and the seat heater was completely melted down. > It's a 2002 9-5 Aero, and it DOES have a dash switch. > (Don't all models with seat heaters? No, some only have a thermostatic switch in the seat. > at least some models have an occupancy switch as well. yes, also for the safety belt warning light (no need to light the light if there's no passenger) -- MH '72 97 '77 96 '78 95 '79 96 '87 900T8 http://go.to/saab96 > My heated Front Driver's seat died on me today.(85 900T) Hopefully it's not > an omen. Just curious how I'd go about troubleshooting the problem. The This is common with c900 heated seats. Usually it's due to the element breaking somewhere. It's easy enough to see where once you peel back the upholstery, since it generally leaves a burn mark in the foam. Search around on google, there are various Saab-specific heated seat repair guides available. John > This is common with c900 heated seats. And the 95/96 > Usually it's due to the element breaking > somewhere Disconnect the heater element wires under the seat and test for continuity. If there is none, the heater wire is broken/disconnected in the seat, usually at the terminals of the thermostat switch in the seat. -- MH '72 97 '77 96 '78 95 '79 96 '87 900T8 http://go.to/saab96 >>This is common with c900 heated seats. > [quoted text clipped - 12 lines] > '87 900T8 > http://go.to/saab96 This is also common in Volvo seats. The heat element breaks, often when someone kneels on the seat or stands on the seat. I have the best of both worlds - a 245 turbo and a C900 turbo - both with manual transmissions :-) Different cars, different rides. |
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