Fleetwood FWD V8-300 4.9L (1993)
Data Link Connector: Description and Operation
Assembly Line Diagnostic Link (ALDL) Connector
ALDL Connector
PURPOSE
Serial Data is a single wire line that the Powertrain Control Module (PCM) uses to communicate and share information with other systems.
OPERATION
A Serial Data line is part of the ALDL connector and is used for hookup of test equipment.