Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSISUZU2006ASCENDER S, 5.3 M, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 615 (LIGHTING SYSTEMS)DIAGNOSTIC INFORMATION AND PROCEDURESDTC B2615CIRCUIT/SYSTEM TESTING
2006 Isuzu Ascender S, 5.3 M, 4WD
Circuit/System Testing
2006 Isuzu Ascender S, 5.3 M, 4WDSECTION Circuit/System Testing
WARNING: This page is about a different car, the 2009 Pontiac Torrent and 2009 Chevrolet Equinox. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition OFF, disconnect the X4 harness connector at the BCM.
- Ignition ON, verify that a test lamp illuminates between the INT LAMPS fuse B+ circuit terminal 2 and ground.
- If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
- Ignition OFF, connect the X4 harness connector at the BCM.
- Ignition ON, with a scan tool clear all DTCs.
- Ignition OFF, disconnect the harness connectors at the following components:
- Cargo lamp
- Dome lamp
- Dome lamp switch
- Overhead console courtesy/reading lamps
- Operate the vehicle within the conditions for running the DTC and verify the DTC does not reset.
- If the DTC resets, test the appropriate control circuit listed below for a short to ground. If the circuit tests normal, replace the BCM.
- Cargo lamp terminal B
- Dome lamp terminal A - without UUC
- Dome lamp terminal C - without UUC
- Dome lamp switch terminal A - with UUC
- Overhead console courtesy/reading lamps terminal C
- If the DTC resets, test the appropriate control circuit listed below for a short to ground. If the circuit tests normal, replace the BCM.
- Reconnect each component one at a time and verify the DTC does not reset as current.
- If the DTC resets as current, test or replace the component responsible for setting the DTC.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.