The transient generator CAR-TG 20 is designed according strict specifications of Ford standards. As per standards FORD FMC1278 and EMC-CS-2009.1 the transient tests defined in RI130, CI220 and CI 260 are generated by CAR-TG20. By that is meant pulse forms: A1, A2-1, A2-2, C-1, C-2 and F.
Therefore, a specified 12VAC Potter & Brumfield relay as well as other parts defined by standard create pulses which are close to real appearing transients.