Right Rear Turn Lamp Circuit Short to Battery
The right rear turn signal lamp is drawing too much electrical current, likely because a wire is touching the battery positive terminal or a relay is stuck. Think of it like a short circuit in a water pipe where water bypasses the normal path and floods directly through.
The body control module monitors the voltage and current draw of the right rear turn lamp circuit through a dedicated control pin. It detects when the circuit voltage remains at battery level when the lamp should be off, or when current draw exceeds normal operating parameters. A short to battery causes continuous high voltage that triggers the fault code.
| Parameter | Normal Range | Fault Condition |
|---|---|---|
| Circuit voltage when lamp off | 0V to 0.5V | 11V to 14V (battery voltage) |
| Current draw during operation | 0.5A to 2A | Above 3A or continuous draw |
Code B2536 is a low-severity fault. Your vehicle is generally safe to drive to a workshop for diagnosis. However, do not ignore it indefinitely — low-severity codes often indicate developing problems that become expensive if neglected. Book a diagnostic appointment within 2–4 weeks. If you notice any additional symptoms (rough running, power loss, unusual smells), treat it as higher priority.
Once the fault is repaired, B2536 can be cleared using any OBD-II scanner. Connect the scanner, navigate to "Clear Codes" or "Erase DTCs," and confirm. The check engine light turns off immediately.
The code will return if the root cause was not actually fixed. The ECM re-detects the fault within 1–3 drive cycles and sets the code again.