Rear Driver Side Power Window Circuit Malfunction
What does B1305 mean?
The B1305 code means the vehicle's onboard diagnostic system has detected: Rear Driver Side Power Window Circuit Malfunction. This is a low severity code.
Common Symptoms
- Rear left window not responding
- Window operates slowly
- Clicking noise from rear left door
- Master switch controls rear left window but rear switch does not
- Window stuck partially open
Probable Causes (Ranked by Likelihood)
- Failed rear left window motor Very High
- Broken window regulator High
- Faulty rear left window switch Moderate
- Wiring damage in rear left door jamb Moderate
- Master switch rear left channel failure Low
Step-by-Step Diagnostic Procedure
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Check window lock-out button on driver door
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Test window from both master switch and rear local switch
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Check power window fuse
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Test for power at rear left window motor connector
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Inspect door jamb wiring for breaks
Frequently Asked Questions
Why does the rear window work from the master switch but not the local switch?
This indicates the rear local switch has failed. The master switch uses a separate circuit path to control each window, so if the master works, the motor and regulator are likely fine.
Are rear window regulators the same as front?
Rear window regulators are typically smaller and may use a different design than front regulators. Always verify the correct part number for the specific door position.
Is rear window motor failure common?
Rear window motors tend to last longer than front ones because they are used less frequently. When they do fail, it is often after many years of service.