The switch is designed to complete the circuit with the application of the brake pedal allowing stop light operation. STOP LIGHT SWITCHES. • Circuit: Dual - Normally Open - Normally Closed.
I got this part to see if it was the reason why cruise control didnt work and a couple of lights were on the dash. Didnt fix anything so must be something else that is wrong...Worth a go as didnt cost a lot, was easy to install and probably the first thing a service mob would try anyway?