B1686
Lamp Dome Input Circuit Open
Severity
✅ LowCan you drive?
Yes, but get it checked soon
Approx. repair cost
$17–56 (est.)
Symptoms
- Interior lamp does not turn on
- The interior lamp turns on randomly
- Error B1686 in fault memory
- Incorrect operation of other lighting systems
Causes
- Broken wiring harness
- Interior lamp malfunction
- Short circuit in the circuit
- Oxidation of contacts
- Body Control Module (BCM) Malfunction
How to Fix
- Check the functionality of the interior lamp
- Inspect the wiring harness for breaks or damage
- Check the integrity of the interior lamp fuse
- Check contacts and connectors
- If necessary, replace faulty components
- Reset the error and check the system operation