that repairs the unit.

Also my comment about the motor's brushes being bad (that's what I thought) was not valid. They are ok.

The main problem with these units (other than the shorting-out of the wires in the main cable) mostly rests in the reference pot. It wears due to the continual movement of the wiper which literally erodes the resistance material. Once that happens, there's no way to fix that other than replacing the ref pot sub-assy. But it isn't a 'stocked' item, so were SOL!

About all one can do is buy a new unit (recommended!) or finding a wrecked low-mileage car. Since age and heat combine to deteriorate the ref pot (and wires), replacing it with a used unit from a high milage car will probably not work too long.

Re aux fans delay ckt: my wife's Honda has that same feature. But the way MB has wired this (through relays), you would have to get creative to defeat this feature. But agreed, it would be nice.

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Regards . . . . JimF
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'94 S500 Cpe

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