Diesel Data: Automotive Repair

Left Front Switch Operation

Battery voltage is applied to the left front window switch through the retained accessory power circuit breaker and the power window battery feed circuit when the ignition switch is in the RUN or ACCY position.

Battery voltage is applied to the window regulator motor through the window control circuit and then through the directional drive circuit when any of the UP switches in the left front window switch are operated. The window regulator motor is grounded through the down contact in the left front window switch. The motor runs to drive the window up.

Battery voltage is applied to the window regulator motor in the down direction when any of the down switches in the left front window switch are operated. The window regulator motor is grounded through the up contact in the left front window switch. The motor runs to drive the window down.