Hmmm...no light? There is a switch for the firm ride on the center console, right? When you flip that switch, the light should come on and stay on. When the switch is not flipped, it's in automatic mode, where it will automatically engage the firm ride during speed in excess of 90mph, during hard acceleration, during hard braking, and during hard cornering. If it simply NEVER comes on, I'd check if there's a ride control module in the trunk. It's located on the tray beneath the rear deck. Depending on your year and options, it may be in different locations, I can't ever keep it straight...but I think it's in the middle. Good luck!