Question about 1983 Mercedes-Benz 300-Class

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1980 mercedes 240d blower motor circuit electrial schematic needed

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Diesel giant .com

Posted on May 28, 2010


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Blower motor quit working at the same time power windows also quit air bag lite stays on

I first thought it was a common fuse relay that fed both those circuits but after looking at the schematics they are separate 20A fused window and 30A fused blower motor fed through a resistor pack. There is a separate 10A fuse that does illumination of heat selector speeds.

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Try this site from Diesel Giant. Good pics and layout. They also have a schematic in pdf.

Mar 26, 2010 | 1983 Mercedes-Benz 300-Class

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Blower fan on 1983 240D.

This fan is pretty easy to replace. The reason it operates intermitantly is because the brushes are nearly worn out. It's doubtful that you can find replacement brushes, try googleing it, so if you can, it is a cheaper fix. Remove the underdash cover from the passenger foot well, should be 5-6 screws. You'll have access to the blower box, remove that. another 6-8 screws. once off , the fan is directly exposed. The fan itself has I believe 3 screws that hold it inplace with a plug-style connector that can be taken apart.

Jan 14, 2009 | 1983 Mercedes-Benz 300-Class

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