Yes and no. The early models came with the 3 wire switches and these are
supposed to light the brake warning light if one of the 2 hydraulic
brake circuits fails. 80-84 should have these. This brake failure
warning circuit was dropped in 85 and newer models and the brake fluid
level warning circuit was added.

Mark

Bill Collins wrote:
>
> Close.  There are two hydraulic circuits.  Having two switches allows the brake lights to work if one circuit fails, and it should light the brake warning light on the dash if one circuit fails. (although I have never verified this)
>
> Bill
> ---------------------
> Why are there 2 switches anyway? Don't tell me: Well, you have 2 brake
> lights so you need two switches!