You can verify the wheels on the vehicle are straight ahead and that J 42640 is installed or the ignition switch is in the LOCK position, align the SIR coil assembly with the horn tower, slide the SIR coil onto the steering shaft assembly, seat the retaining ring into the groove, remove the centering tab from the new SIR coil, install the upper trim cover, install the lower trim cover, verify that the tabs on the lower trim cover engage with the tabs on the upper trim cover, align the tilt lever into the steering column, slide the tilt lever handle into the steering column, install the steering wheel onto the steering shaft and enable the SIR system.