I am getting a "swich problem" message on a 95 Eldo - how do find out which switch is the problem. I have ran the codes and have two current "Closed Throttle Angle Out of Range [TPS]" and "Brake Fluid Level Low". Does anyone know how to id which switch. I was told by the shop mechanic thet the "Brake Fluid Level Low" was a bad sensor, the other message does not seem to relate to any switch.