Ferrari Part Number 101663, BRAKE LIGHT SWITCH shown here as used in Ferrari 328 GTB/GTS (1988 -1989 inc. ABS brakes) Table 61 Brake Hydraulic System (For Car With Antiskid System - Variants For Rhd Version). Location in Diagram: 43. Required Quantity: 1. This Ferrari part is used in more than one diagram. Click on the diagrams below to see alternative uses of this part: