B1634 RAM Code - Left High Beam Control Circuit High
Quick Answer
The Front Totally Integrated Power Module (TIPM) monitors the Left High Beam. Common causes include Faulty Left High Beam Bulb, Left High Beam Bulb harness is open or shorted, Left High Beam Bulb circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- B1634 RAM indicates Left High Beam Control Circuit High.
- Common causes
- Common causes include Faulty Left High Beam Bulb, Left High Beam Bulb harness is open or shorted, Left High Beam Bulb circuit poor electrical connection.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code B1634 RAM Description
What are the Possible Causes of the DTC B1634 RAM?
- Faulty Left High Beam Bulb
- Left High Beam Bulb harness is open or shorted
- Left High Beam Bulb circuit poor electrical connection
- Faulty Front Totally Integrated Power Module (TIPM)
How to Fix the DTC B1634 RAM?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the B1634 RAM code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about B1634 RAM Code
1. What does the OBDII code B1634 mean on a RAM vehicle?
The code B1634 indicates a problem with the left high beam control circuit, specifically that it is operating at a voltage that is too high.
2. What are the common symptoms of the B1634 code?
Symptoms include the left high beam not functioning properly, flickering, or staying on constantly, as well as a possible warning light on the dashboard.
3. What causes the B1634 code in a RAM vehicle?
Common causes include a faulty high beam bulb, damaged wiring or connectors in the circuit, a malfunctioning headlight control module, or a short to voltage.
4. Can I still drive my RAM with the B1634 code active?
Yes, you can drive the vehicle, but the left high beam may not function properly, which could reduce visibility at night or in poor weather conditions.
5. How do I diagnose the B1634 code on my RAM?
Start by inspecting the left high beam bulb and its wiring for damage, check for loose or corroded connectors, and test the voltage in the circuit with a multimeter.
6. How can I fix the B1634 code in my RAM vehicle?
Repairs may involve replacing the high beam bulb, repairing or replacing damaged wiring, cleaning or securing connectors, or replacing a faulty headlight control module.
7. Can a blown fuse cause the B1634 code?
While a blown fuse typically results in no power rather than high voltage, it’s still worth inspecting the fuse box for related issues during diagnosis.
8. How much does it cost to fix the B1634 code on a RAM vehicle?
Repair costs vary depending on the issue, ranging from $10–$30 for a new bulb to $200–$500 if the headlight control module needs replacement.
9. Can a faulty alternator trigger the B1634 code?
While unlikely, an overcharging alternator could potentially cause high voltage issues in the electrical system, including the headlight circuit.
10. Should I reset the B1634 code after repairs?
Yes, after completing repairs, use an OBDII scanner to clear the code and verify that it does not return during a test drive.
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