Why would you a glow plug blinking evening when the engine is running in ford ranger?

A blinking glow plug light in a Ford Ranger while the engine is running typically indicates an issue with the glow plug system, often related to a malfunction in the glow plugs themselves, wiring, or the engine control module. This may affect cold starting performance, especially in diesel engines. It's advisable to have the vehicle diagnosed by a professional to identify the specific cause and prevent further engine issues. Ignoring the warning could lead to harder starts or engine misfires.