B3187
Left Rear Window Down Switch Circuit Low
B3187 is an OBD-II diagnostic trouble code meaning: Left Rear Window Down Switch Circuit Low. Common causes: window down switch malfunction, open or shorted wiring harness. Estimated repair cost: $28–78.
Symptoms
- Left rear window does not roll down
- Intermittent operation of the window regulator
- The glass may lower spontaneously
Causes
- Window down switch malfunction
- Open or shorted wiring harness
- Poor contact in connectors
- Body Control Module (BCM) Malfunction
How to Fix
- Check the window down switch with a multimeter
- Inspect the wiring harness for damage
- Check the contacts in the switch and module connectors
- Check the continuity of the circuit using a scanner or multimeter
- 3 pinpoint smart body control module check
Related codes
Error B3187 by Vehicle Brand
FAQ
What does the B3187 code mean?
B3187 is an OBD-II diagnostic trouble code that indicates: Left Rear Window Down Switch Circuit Low
What causes a B3187 error code?
The most common causes of B3187 include: Window down switch malfunction; Open or shorted wiring harness; Poor contact in connectors; Body Control Module (BCM) Malfunction.
How do I fix a B3187 diagnostic trouble code?
To fix B3187: Check the window down switch with a multimeter. Inspect the wiring harness for damage. Check the contacts in the switch and module connectors. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with B3187?
Limited driving only, diagnose soon
How much does it cost to fix B3187?
The estimated repair cost for B3187 is $28–78. Actual cost depends on your vehicle, location, and labor rates.
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