B1553: Decklid Release Circuit Short to Battery
The B1553 code indicates that the Body Control Module (BCM) or rear decklid module has detected a short to battery voltage (B+) in the decklid release solenoid/actuator control circuit. This means the signal wire to the actuator has an unwanted connection to a constant or switched power source, preventing proper control of the decklid opening. It may cause unintended decklid release or blown fuses.
1. Commonly Affected Makes
2. Most Common Causes
- Wiring in the decklid release circuit shorted to battery positive (B+)
- Decklid release solenoid/actuator with internal short circuit
- Faulty BCM or rear decklid module (internal driver shorted)
- Corroded, loose, or bent pins in connectors bridging power and signal circuits
- Improperly wired aftermarket accessories interfering with the circuit
3. Symptoms You Will Notice
- Decklid opens unexpectedly or fails to open when commanded
- Blown fuse for the decklid release circuit
- Decklid release inoperative
4. Step-by-Step Diagnosis
Check for blown fuses related to the decklid release circuit and replace if necessary.
Visually inspect the wiring harness and connectors for damage, corrosion, or shorts to power.
Disconnect the decklid release actuator and measure for voltage on the signal wire; if battery voltage is present with the actuator disconnected, there is a short to B+ in the wiring.
Test the actuator by applying battery voltage directly; if it does not operate or draws excessive current, replace the actuator.
If wiring and actuator are good, suspect a faulty BCM or rear decklid module and perform module diagnostics.
5. Frequently Asked Questions
Is it safe to drive?▼
Yes, the vehicle is generally safe to drive, but the decklid may open unexpectedly or fail to open. Avoid loading items that could be damaged if the decklid opens while driving.
How much does it cost to fix?▼
Repair costs typically range from $100 to $400, depending on whether the issue is a simple wiring repair, actuator replacement, or module replacement.