2005 Buick Rainier: Turn signals don't operate correctly and turn on the high lights instead

Question

When I operate the right directional, it does not work, instead the high lights come on. Occasionally the directional works.

The car is a 2005 Buick Rainier

Answer 1

My guess would be a faulty turn signal switch. Diagnose the issue further by unplugging the switch checking the continuity on its terminals. A new aftermarket one costs about $100, plus labor, of course.