RepairPal Certified shops can diagnose and repair your 2002 Ford Ranger. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.
The alternator is, most likely, defective. It is staying in the 'full field' mode which will cause maximum output and trigger all the symptoms that your are seeing.
thanks for the response ill replace that alternator and see if thats it!!!