I have trouble code 19 on my car. I checked the relay to the fuel injectors and it's good, over 12 volts. The next thing I was told to do was check pins 37 and 57, where are these pins. If they are on the computer how do I tell which ones I should check because when I overhauled the computer on my Trans Am there arn't any numbers and multiple plug in points, is it the same on the Mustang or will these pins be labled. Thanks.