2000 Buick Regal Stalling when turn signals are used?

I recently bought a 2000 Buick Regal, it stalls when I turn the blinkers on, right or left, doesn't matter. All the dash lights come on and the car goes dead. Scary when you're in traffic, the power stearing also goes out. Problem is intermitent. Had 5 different mechanics say they can't find it.... show more I recently bought a 2000 Buick Regal, it stalls when I turn the blinkers on, right or left, doesn't matter. All the dash lights come on and the car goes dead. Scary when you're in traffic, the power stearing also goes out. Problem is intermitent. Had 5 different mechanics say they can't find it. They've replaced the mullti function switch in the stearing column and swear they have been through all the wiring but my car continues to stall. It also intermitently won't start back up, dash lights blink on and off, sounds almost like the battery is completely dead or the starter isn't getting the job done. Also, without warning, the traction assist will turn off, check engine light and ABS lights will come on. The dealership I bought this car from have basically washed thier hands of it and will not service it again. Wondering if anybody out there has some advice? Knows what the problem is? It would be wonderful if I could pin point it, fix it and not freak everytime I drive my car
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