B3886
Trailer Right Tail Lamp Circuit
B3886 is an OBD-II diagnostic trouble code meaning: Trailer Right Tail Lamp Circuit. Common causes: broken wires in the trailer right side light circuit, corrosion of contacts in the flashlight connector. Estimated repair cost: $22–111.
Symptoms
- The right side marker light of the trailer does not work.
- Flashing or unstable operation of the right side of the trailer
- Warning on the dashboard about the malfunction of the lights
Causes
- Broken wires in the trailer right side light circuit
- Corrosion of contacts in the flashlight connector
- Malfunction of the side light itself
- Trailer wiring harness problems
- Malfunction of the control unit responsible for the trailer lights
How to Fix
- Check the serviceability of the right side marker light of the trailer
- Inspect the wiring harness and connectors for damage and corrosion.
- Test the circuit with a multimeter
- Replace damaged wires or connectors
- Check the operation of the chain after repair
Related codes
Error B3886 by Vehicle Brand
FAQ
What does the B3886 code mean?
B3886 is an OBD-II diagnostic trouble code that indicates: Trailer Right Tail Lamp Circuit
What causes a B3886 error code?
The most common causes of B3886 include: Broken wires in the trailer right side light circuit; Corrosion of contacts in the flashlight connector; Malfunction of the side light itself; Trailer wiring harness problems.
How do I fix a B3886 diagnostic trouble code?
To fix B3886: Check the serviceability of the right side marker light of the trailer. Inspect the wiring harness and connectors for damage and corrosion.. Test the circuit with a multimeter. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with B3886?
Do not drive — repair immediately
How much does it cost to fix B3886?
The estimated repair cost for B3886 is $22–111. Actual cost depends on your vehicle, location, and labor rates.
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