B285E
Window Switch Backlighting Circuit Short To Ground
B285E is an OBD-II diagnostic trouble code meaning: Window Switch Backlighting Circuit Short To Ground. Common causes: damage to the wiring harness (frayed insulation, short to ground), oxidation of contacts in switches. Estimated repair cost: $33–167.
Symptoms
- No backlight for power window switches
- Blown fuse associated with backlight circuit
- Backlight flickering or uneven operation
Causes
- Damage to the wiring harness (frayed insulation, short to ground)
- Oxidation of contacts in switches
- Switch backlight failure
- Problems with the backlight control module
How to Fix
- Conduct a visual inspection of the wiring harness in the doors and the transition point to the body
- Check the integrity of the backlight circuit with a multimeter
- Check the operation of the switches and the condition of their contacts
- If necessary, replace damaged components (harness, switch)
Related codes
FAQ
What does the B285E code mean?
B285E is an OBD-II diagnostic trouble code that indicates: Window Switch Backlighting Circuit Short To Ground
What causes a B285E error code?
The most common causes of B285E include: Damage to the wiring harness (frayed insulation, short to ground); Oxidation of contacts in switches; Switch backlight failure; Problems with the backlight control module.
How do I fix a B285E diagnostic trouble code?
To fix B285E: Conduct a visual inspection of the wiring harness in the doors and the transition point to the body. Check the integrity of the backlight circuit with a multimeter. Check the operation of the switches and the condition of their contacts. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with B285E?
Limited driving only, diagnose soon
How much does it cost to fix B285E?
The estimated repair cost for B285E is $33–167. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat