B1C77
Rear Wiper Relay Circuit
B1C77 is an OBD-II diagnostic trouble code meaning: Rear Wiper Relay Circuit. Common causes: faulty rear wiper relay, open or short circuit in the circuit. Estimated repair cost: $22–56.
Symptoms
- Rear wiper does not work
- Rear wiper intermittent operation
- The malfunction indicator on the dashboard lights up
Causes
- Faulty rear wiper relay
- Open or short circuit in the circuit
- Wiring harness damage
- Poor contact in connectors
- Control unit malfunction
How to Fix
- Check rear wiper relay
- Inspect the wiring harness for damage
- Check connections and contacts in the circuit
- Replace relay if necessary
- Test the operation of the windshield wiper after repair
Related codes
FAQ
What does the B1C77 code mean?
B1C77 is an OBD-II diagnostic trouble code that indicates: Rear Wiper Relay Circuit
What causes a B1C77 error code?
The most common causes of B1C77 include: Faulty rear wiper relay; Open or short circuit in the circuit; Wiring harness damage; Poor contact in connectors.
How do I fix a B1C77 diagnostic trouble code?
To fix B1C77: Check rear wiper relay. Inspect the wiring harness for damage. Check connections and contacts in the circuit. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with B1C77?
Limited driving only, diagnose soon
How much does it cost to fix B1C77?
The estimated repair cost for B1C77 is $22–56. Actual cost depends on your vehicle, location, and labor rates.
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