Principles of Operation
The autolamp system provides light-sensitive automatic on-off control of the exterior lamps normally controlled by the regular headlamp switch. The autolamp system keeps the lamps on for a preselected period of time (20 seconds) after the ignition switch is turned off. The preselected time lapse is not adjustable.
Inspection and Verification
Verify the customer concern by operating the autolamps.
Visually inspect for the following obvious signs of mechanical and electrical damage.
Visual Inspection Chart Mechanical Electrical
Headlamp switch
Central junction box (CJB) Fuse:
29 (5A)
BJB Fuse 3 (30A)
Wiring harness
Loose or corroded connections
Headlamp bulb
Headlamp relay
DRL relay 2 (if equipped)
DRL jumper (if equipped)
RAP module (if equipped)
Light sensor amplifier
Correct mounting of light sensor amplifier
If the concern is not visually evident, determine the symptom and proceed to the Symptom Chart.
Symptom Chart
NOTE: Refer to the Wiring Diagrams for connector numbers stated in the pinpoint test.
Symptom Chart Condition Possible Sources Action
The autolamps are inoperative
BJB Fuse 3 (30A).
CJB Fuse 29 (5A).
Headlamp relay.
Parking lamp relay.
Circuitry.
Light sensor amplifier.
Headlamp switch.
GO to Pinpoint Test G .
The autolamps are on continuously
Light sensor covered by opaque material/obstructed.
REMOVE opaque material/obstruction.
Light sensor amplifier incorrectly installed.
INSTALL the light sensor correctly.
Headlamp relay.
Circuitry.
Parking lamp relay.
Light sensor amplifier.
Multifunction switch.
DRL relay 2 (if equipped).
DRL jumper (if equipped).
GO to Pinpoint Test F .