Rear Lamp (Right Side) Circuit Short to Ground
This code indicates a short circuit in the right rear lamp circuit.
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 right rear light is not working because there's a wire touching the ground somewhere it shouldn't be.
What the computer is actually seeing
The computer sees a voltage drop or zero voltage on the right rear lamp circuit when it expects to see 12V when activated.
What a healthy reading looks like
Voltage should be around 12V when the light is activated, and near 0V when it is off.
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 harness for any visible damage or wear, especially near the connectors.
- 22. Check the right rear lamp socket for corrosion or a loose connection.
- 33. Measure the voltage at the right rear lamp connector with the light activated; expect ~12V.
- 44. If not 12V, check for a short in the wiring leading to the lamp. Disconnect the lamp and recheck the circuit for shorts to ground.
- 55. If found, repair the wiring; if good, replace the lamp and retest.
Common causes
- Damaged wiring insulation causing shorts to ground
- Faulty bulb or socket
- Corrosion in connectors
- Previous repairs that were not completed properly
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
You can drive, but you won't have a functional right rear light, which is a safety issue.
Will this code come back after I fix it?
If the repairs are done correctly and there's no further short, it should not return.
Why do I also see codes like B1597 or B1599?
These codes indicate similar short circuits in related circuits for left lamps or other components, relating to the lighting system.
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