Rear Height Will Not Go Up Or Down; Forward Or Back Functions Operate Normally

Using test light, backprobe between rear height motor connector terminal "A" (Yellow wire) and ground. Move power seat rear height switch lever to up position. If test light glows, go to next step. If test light does not glow, check for poor connection or open in Yellow wire between power seat switch and rear height motor. If circuit is okay, replace power seat switch.
Backprobe between rear height motor connector terminal "B" (Light Blue wire) to ground. Move power seat rear height switch lever to down position. If test light glows, go to next step. If test light does not glow, check for poor connection or open in Light Blue wire between power seat switch and rear height motor. If circuit is okay, replace power seat switch.
Backprobe between rear height motor connector terminals "A" (Yellow wire) and "B" (Light Blue wire). Move power seat rear height switch to down, then up position. If test light glows in both positions, check for poor connections at rear height motor. If connections are okay, replace rear height motor. If test light does not glow in both positions, replace power seat switch.