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Differential Lock Tests

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Old Apr 11, 2007 | 12:52 AM
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DRL
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Default Differential Lock Tests

I'm the new owner of a 90 Coupe Quattro. So far, I love it!

The Diff Lock has me puzzled. The console light is on, and the "ABS Off" light is on, all the time. Neither the console switch nor the car's speed seem to have an effect.

So, before I tear up the drivetrain, how do I tell if it's engaged, when all I have is dry pavement and no observers? Another thread referred to vacuum lines and a servo. Any idea where I can find these?
 
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