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.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSISUZU2006ASCENDER S, 5.3 M, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 349 (LIGHTING SYSTEMS)DIAGNOSTIC INFORMATION & PROCEDURESREADING LAMP INOPERATIVECIRCUIT/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 2008 Isuzu Ascender, 2008 GMC Envoy, and 2008 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition OFF, disconnect the harness connector at an affected courtesy/reading lamp center.
- Test for less than 1 ohm of resistance between the ground circuit terminal B and ground.
- If greater than the specified range, test the ground circuit for an open/high resistance.
- Ignition ON, verify that a test lamp illuminates between the inadvertent power supply circuit terminal C and ground.
- If the test lamp does not illuminate, test the inadvertent power supply circuit for a short to ground or an open/high resistance. If the circuit tests normal replace the BCM.
- Connect the harness connector at the courtesy/reading lamp center, and remove the reading lamp bulb.
- Connect a test lamp across the bulb terminals.
- Ignition ON, turn the reading lamp switch on and off. The test lamp should turn on and off when changing between the commanded states.
- If the test lamp is always on, replace the affected courtesy/reading lamp center.
- If the test lamp is always off, replace the affected courtesy/reading lamp center.
- If all circuits test normal, test or replace the affected reading lamp bulb.
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.