can a bad multi-function switch cause a no start on 2005 Chevrolet Monte Carlo

recently i found out the rear side marker bulbs were missing, so i installed them. about 2 or 3 weeks later my air bag light started coming on. when this happens battery light comes on then turn signals would not work this was intermittent. this went on for about a week, then car would not start. found if i put the car in neutral it would start. that lasted about a week. now car will only start once after that have to let it sit for hours