Alternator/generator/regulator Problems of Mercury Montego

The contact owns a 2005 Mercury Montego. The contact stated that while driving 30 mph, the entire electrical system malfunctioned and caused the rear brakes and instrument cluster to fail. The vehicle was taken to an authorized dealer, where a diagnostic test indicated that the throttle body and alternator were faulty. The dealer replaced the throttle body, but not the alternator. The failure continued. The vehicle was taken back to the authorized dealer, where they were unable to diagnose the failure. The failure mileage was 95,275.

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The car was purchased in may of 2011. August 2011, the transmission started to violently jerk and act as if it were in neutral. When gradually applying the breaks, the car would begin to shudder. This would happen only if the engine was warm. By March 2012, the shuddering transmission and jerk was constant. I took it in to be looked at in April of 2012. The alternator was replaced, due to what we thought was a bad battery. The mechanic believed this caused the transmission to jerk. The problem was not solved. June 2012 the transmission was replaced by a Ford dealership for 5,000. July 2012 the car went into fail engine safe mode, the codes pointing to the throttle body. A mechanic cleaned the throttle body saying it might solve the problem. 2 days later the car went into fail engine safe mode again with the same codes with an estimate of $900. The car has 72000k on it and has had three major problems in the past couple of months.

We have had intermittent electrical issues for several years. The car suddenly looses all electrical power. The battery is completely depleted. Once jump started the car will then operate properly. I have had the alternator replaced once and the car has been checked by mechanics several times, no one can find the problem. We often times smell a burnt plastic odor just before the failures. This failure has happened dozens of time over the past 4 years, even during warranty. Ford did nothing for us.

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