High Beam Lamp Control Circuit Range/Performance Problem
There’s an issue with the high beam light control circuit.
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 seeing a problem with how the high beams are controlled, which might be due to a bad bulb, a bad wire, or an issue in the control module itself.
What the computer is actually seeing
The vehicle’s computer monitors the voltage and current flow in the high beam circuit. If it detects a voltage that is out of the expected range (usually around 12V when on), it sets the code.
What a healthy reading looks like
Expected voltage for high beams: around 12V; expected current draw should align with bulb specifications, typically 55W for halogen bulbs (about 4.6A at 12V).
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.
- 1Check the condition of the high beam bulbs - replace any that are burnt out.
- 2Inspect wiring and connectors for damage, corrosion, or loose connections; repair as necessary.
- 3Test the voltage at the high beam connector with the high beams on; should be close to 12V.
- 4If no voltage, test the high beam relay - replace it if faulty, or check the BCM for output signals.
Common causes
- Burnt out high beam bulb
- Shorted or open wiring in the high beam circuit
- Faulty high beam relay
- Defective body control module (BCM)
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's drivable but be cautious, as you may not have high beams for nighttime driving.
Will this code come back?
If the underlying issue isn't fixed, such as a bad wiring or bulb, the code will likely return.
Why does this code pair with other codes?
Common issues in the lighting system can trigger multiple codes due to shared circuits or components.
Working a real vehicle right now?
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