Circuit Description

Body Control Module (BCM) monitors voltage on circuit No. 2409 (Brown wire) between instrument panel fuse block and BCM to determine actual state of the park light relay. See WIRING DIAGRAMS  . BCM also uses this circuit to turn on the park light relay. If voltage in circuits No. 1080 (White wire) and No. 2409 (Brown wire) is low, DTC will set.

Conditions for setting DTC:

• Ignition switch in RUN position.
• Headlight switch in AUTO position.
• Ambient light sensor in DARK state.
• Parking brake is released.
• Circuit No. 2409 or No. 1080 is open.
• Circuit No. 2409 is open with headlight switch in any position.
• Circuit No. 1080 is open with headlight switch in AUTO position.
• System voltage 9-16 volts.
• Conditions met for .5 second.