Test G: The Autolamps Are On Continuously

PINPOINT TEST G: THE AUTOLAMPS ARE ON CONTINUOUSLY

Normal Operation
The smart junction box (SJB) sends a reference signal to the headlamp switch through circuit CLF19 (VT/GN) and a signal to the light sensor through circuit VLF14 (BU/BN). On vehicles with manual climate control, ground for the light sensor is provided by circuit GD133 (BK). On vehicles with electronic automatic temperature control (EATC), ground for the light sensor is provided by the automatic heating ventilation air conditioning (HVAC) module through circuit RH111 (GY/BU).

When the headlamp switch is placed in the AUTOLAMPS ON position, the voltage signal is routed to ground. When the SJB detects the headlamp switch in the AUTOLAMPS ON position, the SJB monitors the light sensor input. The light sensor determines the amount of light based on the input received from the ambient sky conditions. When the ambient level has reached a point (determined by the internal programming of the SJB), the SJB provides voltage to the headlamps, parking and license plate lamps.

On late build vehicles, the SJB also monitors the windshield wiper motor status by sending a voltage reference signal to the wiper motor through circuit CRW01 (WH). When the windshield is wiper is on (except during a mist wipe or while the wipers are on to clear washer fluid during a wash condition), the wiper motor grounds circuit CRW01 (WH) to indicate to the SJB that the wipers are on.







This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Light sensor
- Headlamp switch
- Windshield wiper motor
- EATC system
- SJB

G1-G2:

G2-G6:

G6-G9:

G9-G10:

G10-G11:

G12-G13:

G13-G14:

G14-G15: