This is so if it goes out the torque converter doesn’t stay locked up, which would be way bigger of a problem. The switch will be hot unless you press the pedal in, which is the exact opposite of how a brake light switch works, so it’ll do you no good to try and splice into your brake pedal wiring to fix this. The first one that there is a combined switch down there that controls the cruise control, brake lights, and lockup converter.
You’ll find a couple of different wiring situations down there.
It is caused by a switch under the brake pedal. If you feel that th e engine seems like it is turning faster than it should be while going down the highway, than you could have an issue with torque converter refusing to lock up This allowed for a true 1:1 connection between the engine and rear wheels at high speed, which increased fuel economy. The 700RR were the first GM automatic transmission to come from the factory with a locking torque converter. So let’s get into some common problems that the 700R4 may have. When it comes to doing any sort of troubleshooting on a vehicle I think it is incredibly important to work from a most likely to least likely philosophy, but also weighing it against how difficult something is to get to and cost. While they have been fairly reliable over the years, we have written this guide specifically to help with troubleshooting your 700R4 transmission. It’s been over 20 years since the 700R4 made it into a production vehicle.
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