Circuit/System Verification
WARNING: This page is about a different car, the 2009 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition ON, observe the scan tool Left and Right Turn Signal Switch parameters while cycling the turn signal switch between the left and right positions. The parameters should change between Active and Inactive.
- If the readings do not change between the commanded states, refer to Circuit/System Testing for Turn Signal/Multifunction Switch Malfunction.
- Observe the left and right turn signal lamps while activating the turn signals. The front and rear turn signal lamps and the outside rearview mirror indicators should illuminate and flash when turned ON.
- If the front or rear turn signal lamps are inoperative, refer to the Circuit/System Testing for Turn Signal Malfunction.
- If the front turn signals operate, but the outside rearview mirror turn signal is inoperative, refer to the Circuit/System Testing for Outside Rearview Mirror Turn Signal Malfunction.
- Ignition ON, observe the left turn signal lamps and turn signal indicator on the IPC while activating the left turn signals. The left turn signal lamps and indicators should illuminate and flash when turned ON.
- If the turn signal indicator is inoperative, refer to Turn Signal Indicators Malfunction .
- If the left turn signal lamps and indictors illuminate but flash in a rapid manner, refer to Circuit/System Testing for Tail Lamp Outage Detection Malfunction.
- Ignition ON, observe the right turn signal lamps and turn signal indicator on the IPC while activating the right turn signals. The right turn signal lamps and indicator should illuminate and flash when turned ON.
- If the turn signal indicator is inoperative, refer to Turn Signal Indicators Malfunction .
- If the right turn signal lamps and indictor illuminate but flash in a rapid manner, refer to Circuit/System Testing for Tail Lamp Outage Detection Malfunction.