Interior Lamp Circuit Short to Ground
There's a short circuit in the interior lamp circuit that's causing a fault.
Heads up: this code wasn't in our hand-written library yet, so DiagCoach AI built this page on the fly. Double-check critical specs against service info before condemning parts.
What it means (plain English)
The interior lamp can't get the right power because there's a wire that's been damaged or is touching something it shouldn't, making it hard or impossible for the light to work properly.
What the computer is actually seeing
The vehicle's Body Control Module (BCM) sees less than 0.2 volts in the interior lamp circuit when it should be around 12 volts, indicating a short to ground.
What a healthy reading looks like
Normally around 12 volts on the circuit when the interior lamp should be on.
Guided diagnostic — the DiagCoach way
Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.
- 11. Inspect the wiring and connectors leading to the interior lamp. Look for fraying, damage, or corrosion.
- 22. Check the switch for the interior lamp. Test it for continuity and proper operation.
- 33. Use a multimeter to measure voltage at the BCM connector. You should see close to battery voltage (around 12 volts). If not, trace the circuit back for shorts or breaks.
- 44. If wiring looks good but the voltage is low, consider testing or replacing the BCM.
Common causes
- Damaged wiring in the interior lamp circuit
- Faulty BCM
- Shorted switches or connectors in the lamp circuit
Typical repair cost
$100 - $300
Related codes
Frequently asked questions
Is it safe to drive with this code active?
Yes, but the interior lights may not work, which can be problematic in low-light conditions.
Will this code come back once cleared?
If the underlying issue isn't fixed, the code will likely return.
Why does this code sometimes pair with other codes?
Multiple codes can appear if the short circuit affects other related systems controlled by the BCM.
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