Is there a visual way of knowing if your car is fitted with EPS or just traction control? Im fitting the button on my astra coupe turbo to switch it off but im not sure which pin to use, 31 or 25. I know its 25 if the car has got traction control and EPS, and 31 for just traction control. Pin 31 is already populated on my car, and don't what to take just pot luck and bung it in 25 incase it needs to be sliced into the existing wire in 31. HELP.