CTS V6-3.2L VIN N (2003)
Turn Signal Flasher: Description and Operation
TURN SIGNAL/HAZARD FLASHER LAMPS
The FLASHER fuse in the underhood fuse block supplies battery positive voltage to the turn/hazard flasher module. The turn/hazard flasher module
has ground at G200. The turn signal lamps may only be activated with the ignition switch in the ON or START position. The STRG CTRLS fuse in
the underhood fuse block supplies battery positive voltage to the turn signal switch. When the turn signal switch is placed in either the left or right
position, current flows from the turn signal switch assembly to the turn/hazard flasher module. The turn/hazard flasher module then sends an on-off
voltage signal to either the left or right turn signals and the appropriate instrument panel cluster (IPC) indicator. When the IPC receives an input from
either of the turn signals it starts to track vehicle mileage. When the IPC has determine that the vehicle has traveled over 1.6 km (1 mile) with one of
the turn signals continuously engaged, it shall display the DIC message "Turn Signal On" and request the appropriate chime to notify the driver. The
left turn signals have ground at G402. The right turn signals have ground at G401.
The hazard flashers may be activated in any power mode. The hazard flasher switch is permanently grounded through G200. When the driver turns
ON the hazard flasher switch the contacts in the switch close, grounding the hazard switch input circuit of the turn/hazard flasher module. The
turn/hazard flasher module then supplies battery voltage to all four turn signal lamps and instrument control panel (IPC) in an ON and OFF duty cycle.
This illuminates the turn signal lamps in the same manner as explained above. When a THEFT is occurring, the Dash Integration Module (DIM)
provides a ground to the turn/hazard flasher module hazard input. This allows the hazard lamps to flash during theft detection.
