Left Front Side Marker Lamp Circuit Short to Ground
The left front side marker lamp is not functioning due to an electrical short.
Heads up: this code wasn't in our hand-written library yet, so DiagCoach AI built this page on the fly. Double-check critical specs against service info before condemning parts.
What it means (plain English)
The computer is looking for a specific voltage from the left front side marker lamp circuit. Instead of getting that voltage, it detects a short to ground, meaning the wire may be touching something it shouldn't and causing a malfunction.
What the computer is actually seeing
The module expects a voltage of around 12V at the left front side marker lamp circuit when active. If there's a short, it reads 0V instead, triggering this code.
What a healthy reading looks like
12V typical voltage reading at the left front side marker lamp circuit during operation.
Guided diagnostic — the DiagCoach way
Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.
- 11. Inspect the left front side marker lamp for physical damage and ensure proper connection. Decision: Is the lamp intact and connected? Yes - Proceed to step 2; No - Replace the lamp.
- 22. Check the wiring harness for signs of abrasion, fraying, or other damage along the route to the lamp. Decision: Is the wiring intact? Yes - Proceed to step 3; No - Repair or replace damaged wiring.
- 33. Use a multimeter to measure voltage at the side marker lamp connector with the lamp activated. Expected value: 12V. Decision: Do you get 12V? Yes - Check for ground faults; No - The circuit is open, continue troubleshooting the wiring or replace the control module.
Common causes
- Damaged wiring harness
- Corroded connectors
- Faulty side marker lamp
- Incorrect bulb type or installation
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's safe to drive, but the side marker lamp won't be functional, which could be a safety concern at night or in poor visibility.
Will this code come back after resetting?
If the underlying issue (short or faulty lamp) isn't fixed, it will return after a reset.
Why does this code pair with B1435?
Both codes relate to circuit issues for the left front lighting; they often occur together if there are shared wiring problems.
Working a real vehicle right now?
Let DiagCoach walk you through it live with your specific symptoms, vehicle, and what you've already checked.
Start guided diagnostic →