Fault in Right Rear Lamp Circuit
There’s a problem in the circuit for the right rear lamp.
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 computer found an issue with the power or ground circuit going to the right rear lamp – it might be blown fuses, bad wiring, or a failed lamp itself.
What the computer is actually seeing
The control module monitors voltage and ground continuity in the rear lamp circuit. It expects around 12 volts at the lamp when turned on and a good ground connection.
What a healthy reading looks like
Voltage should be 12V-14V when the lamp is on; ground resistance should be less than 5 ohms.
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. Check the vehicle’s fuse box for a blown fuse related to the rear lamps. If blown, replace and retest.
- 22. Inspect wiring harnesses for damage or corrosion leading to the right rear lamp. Repair as necessary.
- 33. Use a multimeter to measure voltage at the right rear lamp connector; it should read 12V with the lamp turned on. If no voltage, trace back to the source.
- 44. Check the ground connection at the right rear lamp; resistance should be less than 5 ohms. Repair bad connections or grounds as needed.
- 55. If all checks are good, replace the right rear lamp assembly and retest.
Common causes
- Blown fuse for the rear lamps
- Damaged wiring in the rear lamp circuit
- Faulty right rear lamp assembly
- Loose or corroded connector at the lamp or body control module
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
Yes, it's usually safe to drive, but you need to fix the lamp issue soon to ensure visibility and compliance.
Can this code come back after resetting?
Yes, if the underlying issue isn’t fixed, the code may return.
Why does it pair with other codes?
It often pairs with other lamp circuit codes due to shared wiring or electrical issues.
Working a real vehicle right now?
Let DiagCoach walk you through it live with your specific symptoms, vehicle, and what you've already checked.
Start guided diagnostic →