Wait to Start Indicator (Diesel only)
WARNING: This page is about a different car, the 2005 Ford Pickup, 2005 Ford F550 Super Duty, 2005 Ford F450 Super Duty, and 2005 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
The wait to start signal is transmitted to the instrument cluster over the communication network from the PCM. The wait to start indicator illuminates when the ignition switch is in the ON position with the engine OFF indicating that the glow plugs are heating.