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Reading Lamps 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

Reading Lamps B+

1, 2

1

--

--

Reading Lamps Ground Terminal 6

--

1

--

--

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 - row
    • Sun Visor - left Front
    • Sun Visor - right Front

Reference Information

Schematic Reference

Interior Lights Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Interior Lighting Systems Description and Operation

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, switch the dome/reading lamps or dome/reading lamps - row ON and OFF while observing the lamp. The concerning reading lamp should illuminate when switched ON.

Circuit/System Testing

Reading Lamps Circuit Malfunction

  1. Vehicle OFF, disconnect the harness connector at the E37F Dome/Reading Lamps - Front.
  2. Test for less than 5 Ω between the ground circuit terminal 6 and ground.
  3. If greater than the specified range, test the ground circuit for an open/high resistance.
  4. Vehicle in Service Mode and dome/reading lamps OFF, test for greater than 11 V between the circuit terminal 1 and ground circuit terminal 6.
  5. Vehicle in Service Mode and dome/reading lamps OFF, test for greater than 11 V between the circuit terminal 2 and ground circuit terminal 6.
  6. Vehicle in Service Mode and dome/reading lamps OFF, test for greater than 11 V between the circuit terminal 3 and ground circuit terminal 6.
  7. Vehicle in Service Mode and dome/reading lamps OFF, test for greater than 11 V between the circuit terminal 4 and ground circuit terminal 6.
  8. If less than the specified range, test the circuits for a short to ground or an open/high resistance. If the circuits tests normal, replace the K9 Body Control Module.
  9. If all circuits test normal, test or replace the E37F Dome/Reading Lamps - Front.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

    •  Reading Lamp Replacement
    •  Dome and Reading Lamp Replacement
    • Control Module References for BCM replacement, programming and setup
   


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