Pinpoint Test G: The Individual Component Illumination Is Inoperative
Instrument Cluster and Panel Illumination
Pinpoint Tests
Pinpoint Test G: The Individual Component Illumination is Inoperative
Refer to Wiring Diagram Set 71, Cluster and Panel Illumination for schematic and connector information. Diagrams By Number
Normal Operation
The Smart Junction Box (SJB) sends a Pulse Width Modulated (PWM) voltage to the dimmable components through circuit VLN04. Ground is provided through circuits GD115 (BK/GY) and GD116 (BK/VT).
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Illumination source
PINPOINT TEST G: THE INDIVIDUAL COMPONENT ILLUMINATION IS INOPERATIVE
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
NOTE: Failure to disconnect the battery when instructed will result in false resistance readings.
-------------------------------------------------
G1 CHECK THE VOLTAGE TO THE SINGLE ILLUMINATION SOURCE
- Ignition OFF.
- Disconnect: Inoperative Illumination Source.
- Place the headlamp switch to the PARKING LAMPS ON position.
- Rotate the instrument panel dimmer switch to the full illumination position.
- Measure the voltage between the inoperative illumination source, harness side and ground as follows:
- Is the voltage greater than 10 volts?
Yes
GO to G2 .
No
REPAIR circuit VLN04 (VT/GY) for an open. TEST the system for normal operation.
-------------------------------------------------
G2 CHECK THE GROUND CIRCUIT TO THE SINGLE ILLUMINATION SOURCE FOR AN OPEN
- Turn headlamps off.
- Disconnect: Negative Battery Cable.
- Measure the resistance between the inoperative illumination source, harness side and ground as follows:
- Is the resistance less than 5 ohms?
Yes
INSTALL a new component in question. TEST the system for normal operation.
No
REPAIR the ground circuit in question for an open. TEST the system for normal operation.
-------------------------------------------------