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Re: seat heater(long) (archive)

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Posted by JLW on January 30, 2001 at 07:29:18:

In Reply to: Need help with fixing interior stuff....... (M) posted by Spencer on January 29, 2001 at 21:24:53:

As to seat heaters I may be able to help some,as a previous SAAB owner. I do know that both of their seats(SAAB& BMW) are made by Brose (I think thats what their name is). The seat heaters are made of a gride of fine copper wires(flat). Its is possible to damage these with a blunt object, Like your knee or a dogs paw etc.. Anything small diameter with alot of weight. So you must be careful with heated seats. these are repairable by finding the open circuit. The seat is split in 2 sections (upper/lower) these have a 2 pin plug for each section. Then the 2 parts plug together(in series) to form 1 circuit. You can check the continuity with a ohm meter in each section to isolate the problem(usually the bottom). You may find these 2 connectors under the seat. from here if you have a clue as to upolstery you can take the seat apart and find the open and repair it. If not take it to a good trim shop and have them tear the seat down so you can reapir the break. The heater assy are attached to the foam in a sheet which needs to be pulled Back (off) carefully. or a small hole cut in where you find the break. The break should show a burnt spot. Solder back together and have the seat reassembled. If you don't want to reapir the heater. Go to you BMW parts guy He should be able to order the foam with heaters( top or bottom) then have the Trim shop repalce it.(after you determin what part is bad.
I have two problems that have come up with my 95 M3 in the last month.

The first is that the driver side seat heater stoped working. The light on the switch turns on but the seat doesnt heat. The passenger side seat works. Is there a fuse that could have blown? Any wire connections i should check?

The second is that the amber lights that light up the air conditioning controls went out. I am guessing a fuse blew because all the AC control lights went out (i am guessing there is more than one light that lights up that whole panel). If not, how would i go about changing those bulbs?

Any help would be appreciated. Thanks





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