B1312
Lamp Headlamp Input Circuit Short To Battery
B1312 is an OBD-II diagnostic trouble code meaning: Lamp Headlamp Input Circuit Short To Battery. Common causes: damage to control circuit wire insulation, faulty headlight relay. Estimated repair cost: $33–167.
Symptoms
- Incorrect headlight operation
- Flashing headlights
- Automatic headlight system failure
- Illuminated fault indicator on the instrument panel
Causes
- Damage to control circuit wire insulation
- Faulty headlight relay
- Short circuit in wiring harness
- Problems with the body electronics control unit
- Corrosion of contacts in connectors
How to Fix
- Conduct a visual inspection of the wiring harness and connectors for damage.
- Check the resistance and continuity of the headlight control circuit
- Test the headlight relay for proper operation
- Check the voltage at the corresponding terminals of the control unit
- Replace damaged wires or components as necessary
Related codes
FAQ
What does the B1312 code mean?
B1312 is an OBD-II diagnostic trouble code that indicates: Lamp Headlamp Input Circuit Short To Battery
What causes a B1312 error code?
The most common causes of B1312 include: Damage to control circuit wire insulation; Faulty headlight relay; Short circuit in wiring harness; Problems with the body electronics control unit.
How do I fix a B1312 diagnostic trouble code?
To fix B1312: Conduct a visual inspection of the wiring harness and connectors for damage.. Check the resistance and continuity of the headlight control circuit. Test the headlight relay for proper operation. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with B1312?
Do not drive — repair immediately
How much does it cost to fix B1312?
The estimated repair cost for B1312 is $33–167. Actual cost depends on your vehicle, location, and labor rates.
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