Side Marker Light Circuit Right Malfunction
What does B0059 mean?
The B0059 code means the vehicle's onboard diagnostic system has detected: Side Marker Light Circuit Right Malfunction. This is a low severity code.
Common Symptoms
- Right side marker light not working
- Side marker bulb out warning displayed
- Right side of vehicle dark at night
- Right fender marker not illuminating with headlights
- Failed lighting inspection
Probable Causes (Ranked by Likelihood)
- Burned out right side marker bulb Very High
- Corroded side marker light socket High
- Cracked lens allowing moisture damage Moderate
- Open wire in right side marker circuit Low
Step-by-Step Diagnostic Procedure
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Check right side marker bulb condition
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Inspect socket for corrosion or damage
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Test voltage at socket with lights activated
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Inspect lens for cracks or moisture entry
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Check wiring from fuse to right side marker
Frequently Asked Questions
Do newer vehicles use LED side markers?
Many newer vehicles have switched to LED side markers. These last much longer than incandescent bulbs but when they do fail, the entire LED unit may need to be replaced.
Can road debris damage side marker lights?
Yes. Side markers are mounted low on the fenders and are exposed to road debris, curb contact, and splash damage. Cracked lenses from impacts are a common cause of moisture-related failures.
Is the side marker on the same circuit as the parking light?
Often yes. Side markers typically illuminate whenever the parking lights or headlights are on. They share the same fuse and power feed on many vehicles.