Finally, for those who've lifted their JK's or fooled with the drag link and tie rod, you can enter the ProCal's Wheel Centering Mode, which indicates to the user exactly where zero is on the internal sensor. When in this mode, both turn signal and high-beam indicators will light, showing that you're dead center. This helps an alignment technician (or you on an alignment rack) dial your JK in perfectly. By having your steering exactly centered, ESP issues won't be popping up when you don't need them.
The AEV ProCal Module is small and easily stored in the glove box or center console. With the wide range of calibrations allowed, we think the ProCal may be one of the hottest items introduced for the JK Wrangler since its inception.
 The ProCal plugs into the...  The ProCal plugs into the JK's diagnostic port on the driver's side. After each setting, the horn honks twice to let you know calibration was successful. As you can see, the ProCal's compact size makes it easy to store in the glove box or center console. |  The ProCal uses DIP switches...  The ProCal uses DIP switches to easily program settings. The switches are pushed either up or down, depending on the calibration required. AEV supplies a card that gives all switch positions. |  |