OK, one of the issues with that vintage S series was a hazard switch problem where the contacts would melt and cause loss of turn signals or brake lights. Or the switch breaks and the hazard lights stay on. The way to tell if this is the issue is simple. You pull the hazard switch actuator out of the switch and see if the contact carrier is melted/deformed.
It just pulls out of the column. I have seen the carrier melted but have also seen the switch in the column fail as well. That means a new switch assembly.
Wednesday, January 18th, 2017 AT 12:41 PM