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, 3 | 1 | -- | -- |
Reading Lamps Ground Terminal 6 | -- | 1 | -- | -- |
1. Reading lamps always Off 2. Sunshade lamps always Off 3. I/P Compartment lamp Always Off | ||||
Circuit/System Description
The body control module (BCM) supplies the the dome/reading lamps, sunshade and I/P compartment lamp with battery voltage. When switching on the following components the concerning lamps will illuminate:
| • | Dome/reading lamps |
| • | Dome/reading lamps - row |
| • | Sunshade - left Front |
| • | Sunshade - right Front |
| • | I/P compartment lamp |
Reference Information
Schematic Reference
Connector End View Reference
Description and Operation
Interior Lighting Systems Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
Ignition ON, 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
- Ignition OFF, disconnect the harness connector at the E37A Dome/Reading Lamps or E37B Dome/Reading Lamps - Row.
- Test for less than 5 Ω between the ground circuit terminal 6 and ground.
- Ignition ON, test for greater than 11 V between the circuit terminal 1 and the ground circuit terminal B.
- If all circuits test normal, test or replace the E37A Dome/Reading Lamps or E37B Dome/Reading Lamps - Row.
| ⇒ | If greater than the specified range, test the ground circuit for an open/high resistance. |
| ⇒ | 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 (BCM). |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • | Control Module References for BCM replacement, setup, and programming |
