2001 MONTE CARLO STOP WHILE DRIVING
IT STOP WHILE DRIVING AND WONT START BUT STILL HAVE POWER
ignition switch...ignition relay....undervoltage condition to chassis....read the trouble codes by connecting to the OBD-II port,,,not three feet from the ignition switch...this scanner is about fifteen bucks~
....sounds like a classic case of a corroded MAIN ground...the black batttery cable has two terminals...the BLACK one has a length then attaches to the frame with a bolt and lug...this is the end of the black 1/0 cable...undo the bolt...wirebrush the lug free of any corrosion to show shiny metal...same with the spot that it bolts too...wire brush that spot....put them together...get a NEW battery (yours is most assuredly older than five years old) at which time they should be replaced because ten percent per year is how they slowly stop accepting a charge.~ the date of it's first charge can be noted on "knock-off" indicators of month and year~