Why does the turn signal shut engine off on my 1997 buick regal GS?

i have a 1997 Buick Regal GS 3800 engine that is not turning on and when it did i would put the turn signal right or left and it will shut the engine off immidetly . I had the ignition switch replace about 6 months ago by the dealer so i think thats not the problem. any advice plz post because many people have the same problem.Why does the turn signal shut engine off on my 1997 buick regal GS?it might be your alternator, becuz i have a 97 buick le sabre and my car kept cutting off after i had a jump, i thought it was my radiator and it wasn't thought it was my battery so i bought a new and it still did the same thing then i got a new alternator and that fixed my problem, because when ur alternator is weak it takes the juice from ur battery and shuts the car offWhy does the turn signal shut engine off on my 1997 buick regal GS?I suspect the alternator is the problem. A computerized vehicle requires a 6volt reference signal from the sensors to the computer, and when the voltage drops below 6volts the vehicle will shut off. located on the right/passenger side on the rear of the engine, near the firewall is the alternator. This can be tested with a voltmeter of a non-magnetic screwdriver. When running the charging system on most cars runs between 13.4volts DC to 14.8volts DC. any more or less will indicate a charging problem. The screwdriver test, is to check for magnetism at the rear bearing cap on the alternator. When an alter. is charging it will created an electro-magnetic field, which can be tested using something medal that is non-magnetic. If the screwdriver gets stuck to the back of the alter. then the system is charging, if it doesn't, the voltage regulator inside the alter. is bad. Hope this helps, and good luck. Christopher