My 2002 Mercury Mountaineer, v8, AWD, just died, it wont start, the battery is still good, a friend of mine checked and he said that it could be the starter or the electrial area. he said that when he checked the eletrical, there was one that seem looser than the others and for the starter-it may not be it because there was no noise at all when we drove it....I just drove 15mintues before it died on me and it was running normal..what could b the problem?