NOTE: The control unit is built into the driver's switch assembly, and only controls driver's door window operation.
Remove the driver's door panel and disconnect the 14-P and 1-P connectors from the driver's switch assembly. Make the following input tests at the connector terminals.
NOTE: Recheck the connections between the 14-P and 1-P connectors and the driver's switch assembly, then replace the driver's switch assembly if all input tests prove OK.