I changed spark plugs yesterday . In doing so I unbolted the brake booster and moved it out of the way so I could get to the plugs on the driver side . After changing plugs and bolting booster back in , now the brake pedal rod is short and the brake lights stay on . Any help will be appreciated !

 

Wow, man. Why did you remove the booster? The brake light switch is on the pedal assembly. It sounds like the pedal is pressed or shifted.