So, as an engineer at Chrysler, I can tell you that we would not put more sets of contacts in a switch than what you need. The brake switch has two sets of contacts (has for many many years) for a number of reasons. One set normally open, one set normally closed. The reason for two sets? More than you think.

First off, the two sets allows us to diagnosis the switch. People rest their foot on the brake pedal (two foot drivers), this will usually only open the first set of contacts, or tells us the switch is out of adjustment (because some dufuss installed pedal dress up wrong -jk). If you depress the brake pedal a little the first set of contacts changes state. This is used for the shift out of park and cruise control cancel. Why? We as engineers want this as seamless as possible. When you depress the brake pedal to shift out of park, you would be upset if you had to push the pedal all the way down to trip the second set of contacts. A women, young driver, etc., may not have the strength to depress the pedal far enough down to allow the BITSI to disengage and allow the shift out of park under certain conditions, like when the vacuum in the booster is depleted and the pedal goes hard.

When you have cruise control on and want to cancel, you sure just want to tap the brake pedal instead of slowing the vehicle by having to hit the second switch. It was also designed that you can cancel cruise without the tail lights illuminating which the cops would normally see at night and zap you with the radar gun. The second set of contacts which close is for your brake lights and also input for the ESC system. There are a few other reasons also. Why the switch does not have a barrel nut on it for adjustment like the old cars? It self adjusts when assembled into the vehicle, saving us time during assembly and access to under dash is a joke now versus what it use to be. Believe me there are always very good reasons many things are done a certain way that you might not have thought of.

The remote start feature... obviously something you want done right and with the car functioning properly. So we will not allow remote start if a door or hood or rear hatch is not fully shut, if someone is in the car, could be a young child trying to push the brake pedal and shift like mommy or daddy does when you press remote start, any DTC's in the car which could cause issues with the engine or some other aspect of the vehicle not functioning properly (Park paw not holding, so it could roll) etc., we also do not remote start unless vehicle is locked ( so someone cant jump in and drive your car away),we give you approximately one minute to hit the start button after unlocking and opening the door with the proper FOB broadcasting in the vehicle or the proper key code on a metal key when inserted into the ignition switch, or we shut it down, A lot more to all these auto assist features than you can possibly imagine. If done wrong, or not covering every little aspect of operation with proper safe guards the lawyers who represent the people who should not be driving are quick to sue the company.