I have a 97 Tioga Ford chassis. I am adding a brake controller easy enough. Looked under dash and found plug for Tekonsha harness and thinking way too easy. I plugged in harness then plugged in the brake controller and the passenger front parking light came on. Doesn't matter if the key is on or off running or not the light stays on. Only goes off by unplugging the brake controller. Anyone ever ran into this before?