Feb 09, 2018 · -temp install the trailer break controller and traction control/tow haul/parking sensor switch panel electrically-connect the negative battery terminal-start the truck, the led's on both triggers should flash then turn off, nannies should turn off automatically at 9 seconds after the triggers receive power. NOTE: To improve the vehicle’s traction when driving with snow chains, or starting off in deep snow, sand or gravel, it may be desirable to switch to the Partial Off mode by pressing the switch. Once the situation requiring ESC to be switched to the Partial Off mode is overcome, turn ESC back on by momentarily pressing the switch.