Service Information

Volt

Sun Visor Illumination Malfunction

Diagnostic Instructions

•	Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

•	Review Strategy Based Diagnosis for an overview of the diagnostic approach.

•	Diagnostic Procedure Instructions provides an overview of each diagnostic category.

Diagnostic Fault Information

Circuit	Short to Ground	Open/High Resistance	Short to Voltage	Signal Performance
Sun Visor Lamps B+	1, 2	2	--	--
Sun Visor Lamps Ground	--	2	--	--
1. Reading Lamps Always OFF 2. Sun Visor Lamps Always OFF

Circuit

Short to Ground

Open/High Resistance

Short to Voltage

Signal Performance

Sun Visor Lamps B+

1, 2

Sun Visor Lamps Ground

1. Reading Lamps Always OFF

2. Sun Visor Lamps Always OFF

Circuit/System Description

The body control module (BCM) supplies the dome/reading lamps and sun visor lamps with battery voltage. When switching on the following components the concerning lamps will illuminate:

•	Dome/reading lamps

•	Sun Visor - left Front

•	Sun Visor - right Front

Reference Information

Electrical Information Reference

•	Circuit Testing

•	Connector Repairs

•	Testing for Intermittent Conditions and Poor Connections

•	Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

Vehicle in Service Mode, observe the lamp of the sun visor - left front/sun visor - right front while opening and closing. The lamp should illuminate when opened.

Circuit/System Testing

Vehicle OFF, disconnect the harness connector at the appropriate inoperative sun visor.
Test for less than 5 Ω between the ground circuit terminal B and ground.

⇒	If greater than the specified range, test the ground circuit for an open/high resistance.

Vehicle in Service Mode, test for greater than 11 V between voltage circuit terminal A and the ground circuit terminal B.

⇒	If less than the specified range, test the circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K9 Body Control Module.

If all circuits test normal, test or replace the inoperative sun visor.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

•	Sun visor Replacement

•	Sun visor Support Replacement

•	Control Module References for BCM replacement, programming and setup