B1361: Ignition Run/Acc Circuit Short to Battery
The Body Control Module (BCM) or Smart Junction Box (SJB) has detected a short to battery voltage on the Ignition Run/Acc circuit. This circuit tells the module the key position (Run or Accessories). A short to battery keeps the circuit constantly powered, preventing systems from entering sleep mode and causing parasitic battery drain.
1. Commonly Affected Makes
2. Most Common Causes
- Chafed, pinched, or exposed wiring in the Run/Acc circuit contacting a constant 12V source
- Faulty ignition switch with an internal short
- Internally damaged BCM or SJB
- Improperly wired aftermarket accessories (alarm, radio, remote start) on this circuit
3. Symptoms You Will Notice
- Battery drains overnight or after short periods
- Electrical systems (radio, interior lights) stay on with key off
- Check Engine Light or warning lights on
- Vehicle may not start or have intermittent starting issues
4. Step-by-Step Diagnosis
Check for parasitic draw with a multimeter; note current above 50mA
Inspect the Run/Acc circuit wiring for damage or contact with constant power
Test ignition switch for continuity in Off position
Disconnect aftermarket accessories to isolate the fault
If wiring and switch are good, suspect BCM/SJB failure
5. Frequently Asked Questions
Is it safe to drive?▼
You can drive short distances, but the battery drain may leave you stranded. Have it diagnosed soon.
How much does it cost to fix?▼
Repair costs range from $100 for a wiring fix to $800+ for BCM replacement.