Guest northmn Posted July 16, 2009 Share Posted July 16, 2009 Does anyone have a good used MCM for sale.It is a black plastic box aprox 4 " square that is plugged into the convenience centre under the left side of the steer wheel column? Link to comment Share on other sites More sharing options...
sosuzguy Posted July 16, 2009 Share Posted July 16, 2009 Bob The part number should be 25519224 for an 83. I need two myself I found some at Collector Auto but they want $150.00 for one, NOS. The 84/85 version is 25524794 and is still available from Buick. One of the differences is the 84/85 just has a series of blades, where the previous versions had blades and a couple of wires that would plug into the fuse box. maybe the 84/85 version can be retrofitted if you study the wiring schematics in both 83 & 84 service manuals? I'm going to also check into it. I know the LPS connector at the fuse box is still there in 84 as it was needed in 83 for the chime module.I researched these and found that most of the problem is foam that deteriorated and makes the sound so low you can't hardly hear it. door bell chimer - TurboBuick.ComSure wish we could find us someone who's a wiz at electronics to repair these things... anyone? Link to comment Share on other sites More sharing options...
Guest TwoDoorBuickMan Posted July 17, 2009 Share Posted July 17, 2009 If your module still chimes, but the volume is so low it can only be heard by putting your ear close to the dash, the repair is fairly simple. For part # 25524794, open the end and pull the unit out. On the top of the unit, you will see a round black object about 1 1/2 in. in diameter. It is held in place by plastic connectors that hook it to 2 posts. Remove the black object by prying gently on the plastic connector that holds it to each post. I usually use a heat gun to soften the plastic. It is usually brittle from age and easy to break if I don't. It is tricky because too much heat will melt the plastic. Once removed, turn it over. You will see a metal disc held in place by a plastic retainer. Remove the retainer and the disc will fall out. You will find remnants of a narrow foam rubber ring. Clean the remnants from the ring and fashion a new one. I use foam packing sheets that are about 1/16 of an inch thick. The ring does not need to be as narrow or precise as the original. Reverse the process and your module should make a chime that is quite audible. I don't have any of the earlier model modules to look at, but have used the same process on modules for earlier Oldsmobiles and Buicks that had the wire in addition to the blades. Good Luck! Link to comment Share on other sites More sharing options...
tim63riv Posted July 17, 2009 Share Posted July 17, 2009 Fellas,I used to get PAID to "get rid of that G-- D--- buzzer!" Must have removed and thrown away dozens of MCMs in perfect working order. Let's see how much is dozens times $150.00 . . . ?Tim Link to comment Share on other sites More sharing options...
Guest northmn Posted July 17, 2009 Share Posted July 17, 2009 TimI'am still laughing.I was waiting for someone to say something normal like that.Maybe I did hammer the sucker years ago.I still might do that again if the new one starts bugging me too much.Bob. Link to comment Share on other sites More sharing options...
sosuzguy Posted July 20, 2009 Share Posted July 20, 2009 (edited) I'll have to pull one of mine out of the 83 cars and see if I can do this. I'll try to take pictures when I do this for all to see. Edited July 20, 2009 by sosuzguy (see edit history) Link to comment Share on other sites More sharing options...
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