Reply to "No Brake Lights"

The VW dual circuit master cylinders have two brake switches in order to use the warning light that is on the speedo. They use 3-prong switches and are wired to light the warning lamp if one of the master cylinder circuits fail. The wiring is a little complicated, but actually a simple electrical circuit that sends power to the speedo warning lamp if one master cylinder hydraulic circuit fails.

However, as @DannyP pointed out, the switches fail frequently. Much more often than the master cylinder in my experience!

4/30/2110:42 AM

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