2003 Mercury Sable loses electrical power to everything momentarily while driving or when stopped it dies will restart dealer stumped any ideas thanks?
I have the same vehicle and had the exact same problem. It failed several times over a period of 1 1/2 years and would always restart until one day it just died. It turned out to be a faulty relay in the security system. Once the relay was replaced I never had the problem again.
What is wrong if everything electrical starts to short out while driving and the engine is overheated?
Is there an electrical problem in a 2000 mercury cougar that would cause it to shut down while driving?
In this case, the starter was the problem after 55K miles. While driving on freeway, the instrument cluster of lights flashed momentarily and then the car went dead. After coasting to the side of road, the electrical system worked fine, but the car wouldn't start. Not sure why a bad starter caused the car to go dead while driving. After inspecting and cleaning all electrical connections from the battery to the starter, and checking all…
Most vehicles need a couple drive cycles for all the monitors to report to the ECM that everything is in good working order. A drive cycle consists of a cold start (sitting overnite), turning on electrical accessories (heater or AC, lights, etc) some city driving and some highway driving. Depending on the vehicle and your driving habits it could take several cycles.