B1781
Mirror Driver Down Short To Ground
B1781 is an OBD-II diagnostic trouble code meaning: Mirror Driver Down Short To Ground. Common causes: damage to the wiring harness in the door, short circuit in the mirror motor. Estimated repair cost: $22–111.
Symptoms
- Driver's side mirror down adjustment does not work
- The mirror does not move or jerks when you try to lower it
- Other mirror adjustment functions work fine
Causes
- Damage to the wiring harness in the door
- Short circuit in the mirror motor
- Adjustment switch malfunction
- Oxidation of contacts in connectors
- Circuit Grounding Problems
How to Fix
- Check the wiring harness between the control unit and the mirror for damage.
- Check the resistance of the electric motor (should be within 2-10 Ohms)
- Check the operation of the mirror adjustment switch
- Inspect and clean the contacts in the connectors
- Replace faulty motor or wiring harness
Related codes
FAQ
What does the B1781 code mean?
B1781 is an OBD-II diagnostic trouble code that indicates: Mirror Driver Down Short To Ground
What causes a B1781 error code?
The most common causes of B1781 include: Damage to the wiring harness in the door; Short circuit in the mirror motor; Adjustment switch malfunction; Oxidation of contacts in connectors.
How do I fix a B1781 diagnostic trouble code?
To fix B1781: Check the wiring harness between the control unit and the mirror for damage.. Check the resistance of the electric motor (should be within 2-10 Ohms). Check the operation of the mirror adjustment switch. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with B1781?
Limited driving only, diagnose soon
How much does it cost to fix B1781?
The estimated repair cost for B1781 is $22–111. Actual cost depends on your vehicle, location, and labor rates.
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