2500 4x2 Pickup L6-359 5.9L DSL Turbo (1994)
Automatic Shut Down (ASD) Relay: Description and Operation
DESCRIPTION
This circuit controls operation of the Automatic Shut Down (ASD) relay. It provides the necessary power to operate the generator field control for
charging system operation.
OPERATION
The ground circuit for the coil in the ASD relay is controlled by the Powertrain Control Module (PCM). The PCM operates the relay by switching
the ground circuit ON and OFF.