Front Height Will Not Go Up &/Or Down (Forward Or Back Functions Operate Normally)
1) Using test light, backprobe between Dark Blue wire terminal at inoperative seat adjuster motor assembly connector C2 and ground. Move power seat switch to front height down position. If test light glows, go to next step. If test light does not glow, check for poor connection or open in Dark Blue wire. If circuit is okay, replace power seat switch.
2) Backprobe between Dark Green wire terminal at inoperative seat adjuster motor assembly connector C2 and ground. Move power seat switch to front height up position. If test light glows, go to next step. If test light does not glow, check for poor connection or open in Dark Green wire. If circuit is okay, replace power seat switch.
3) Backprobe between Dark Blue and Dark Green wire terminals at inoperative seat adjuster motor assembly connector C2. Move power seat switch to front height down, then front height up positions. If test light glows in both positions, check for poor connections at front height motor. If connections are okay, replace front height motor. If test light does not glow in both positions, replace power seat switch.