01495 – Left high beam headlamp bulb – open circuit/short circuit to B+ (Volkswagen)

Volkswagen-specific code — factory diagnostic data

Last updated: March 31, 2026

Definition source: Volkswagen factory description · Autel MaxiSys Ultra & EV. Diagnostic guidance is based on factory-defined fault logic for this code.

01495 means your Volkswagen has a fault in the left high-beam circuit, so that high beam may not work when you need it. In real use, you may lose left-side high-beam output or see erratic high-beam behavior. According to Volkswagen factory diagnostic data, this code indicates an open circuit or a short circuit to B+ in the left high beam headlamp bulb circuit. This is a manufacturer-specific Volkswagen code, so the exact monitoring method can vary by platform and body electronics design. Treat the scan tool’s definition as the baseline. Then confirm the electrical fault with circuit checks before replacing parts.

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01495 Quick Answer

01495 points to an electrical fault in the left high-beam bulb circuit. The circuit has an open, or it has shorted to battery positive (B+).

What Does 01495 Mean?

Official definition: “Left high beam headlamp bulb – open circuit/short circuit to B+.” In plain terms, the vehicle detects that the left high beam cannot be correctly controlled. That usually means the lamp will not turn on, stays on incorrectly, or behaves inconsistently.

What the module is checking and why it matters: Volkswagen body electronics typically monitor the high-beam output electrically, not just by switch position. The controlling module expects a certain load and a predictable voltage change when it commands the left high beam on or off. An open circuit prevents current flow, so the module sees no load or no expected voltage drop. A short to B+ feeds battery voltage into the circuit when it should not. That can backfeed the output stage and confuse the module’s monitoring. This code identifies a suspected trouble area only. It does not prove the bulb or module has failed.

Theory of Operation

Under normal operation, the stalk switch requests high beams. The body control electronics then power the left high-beam filament or lamp driver through a fused output. The same module watches the circuit for expected electrical behavior during commanded on and off states.

01495 sets when the module commands the left high beam and detects an impossible circuit state. An open circuit removes the electrical load the module expects. A short to B+ forces voltage on the line when the module expects the circuit to sit low. Either condition breaks the module’s ability to control and verify the left high-beam output.

Symptoms

You will usually notice a lighting problem first, not a driveability problem.

• Inoperative left high beam does not illuminate when selected
• Warning bulb-out message or exterior lighting warning on the cluster, if equipped
• Asymmetry right high beam works but the left side stays dark
• Stuck on left high beam stays on or glows when it should be off (backfeed symptom)
• Intermittent left high beam cuts in and out with bumps or steering movement
• Flicker rapid flickering on the left high beam, especially with poor connections
• Related codes other left-front lighting or load-monitor DTCs may store with it

Common Causes

• Open filament or internal bulb failure: The left high beam bulb can open electrically, so the Volkswagen lighting controller sees no current flow.
• High resistance at the left headlamp connector: Heat, spread terminals, or mild corrosion increases resistance and makes the circuit behave like an open under load.
• Power feed open between fuse/power distribution and headlamp: A break in the B+ feed to the left high beam stops current, so the module flags an open circuit condition.
• Short to B+ on the control/return side: Chafed wiring can contact a constant battery feed, so the module detects “short circuit to B+” even when it commands the lamp off.
• Incorrect bulb type or incorrect installation: The wrong bulb or mis-seated base can prevent proper contact, which mimics an open circuit to the module.
• Water intrusion in the headlamp housing: Moisture bridges terminals and accelerates corrosion, causing intermittent opens or a B+ short depending on where it tracks.
• Harness damage near the radiator support or headlamp mounting points: The Caddy’s front harness can rub on brackets, which cuts insulation and creates opens or shorts during vibration.
• Control module output stage fault (after circuit proof): A failed driver in the Volkswagen body electrical system can misread load current or leak voltage, but you must verify wiring first.

Diagnosis Steps

Use a scan tool that can access Volkswagen body/central electrics data, a digital multimeter, and a test light or fused jumper. Have basic back-probing pins and terminal tension tools available. Plan to perform voltage-drop tests with the lamp commanded on. Bring wiring diagrams or service information for the exact 2013 Caddy lighting architecture.

1. Confirm DTC 01495 and record freeze frame data. Focus on battery voltage, ignition state, and whether the high beams were commanded on. Note any companion lighting, power supply, or voltage codes. Freeze frame shows conditions when the fault set, while a scan tool snapshot can capture an intermittent drop during a road test.
2. Inspect the obvious circuit path before meter work. Check the left high beam bulb seating, the connector lock, and visible harness routing at the left headlamp. Then check related fuses and the upstream power distribution feeding the headlamp circuit. Do not assume a fuse looks good; verify it has power on both sides.
3. Verify module power and ground integrity under load. Command a high-load electrical consumer on, then perform voltage-drop testing at the module grounds you can access. Keep ground drop under 0.1V with the circuit operating. A clean continuity reading does not prove a good ground.
4. Use the scan tool to command the left high beam on and off, if output tests exist. Compare left versus right high beam behavior in measuring blocks. A side-to-side comparison helps isolate a wiring or bulb issue without guessing.
5. At the left high beam connector, test for proper B+ feed with the lamp commanded on. Load the circuit while testing, using the actual bulb or a suitable test light. If you see voltage with no load but it collapses with load, you have high resistance upstream.
6. Perform a voltage-drop test on the power side. With the high beam commanded on, measure from battery positive to the headlamp B+ terminal. Excessive drop points to a fuse contact, splice, or connector issue in the feed path.
7. Perform a voltage-drop test on the ground or return side used by the Volkswagen lighting control strategy. Measure from the headlamp ground/return terminal to battery negative with the lamp on. A high reading indicates a poor ground, a damaged return wire, or a bad terminal fit.
8. If the code description includes “short circuit to B+,” check for unwanted battery voltage on the control/return circuit when the lamp is commanded off. Disconnect the headlamp connector and see if the suspicious voltage remains on the harness side. If it remains, trace for a chafe into a constant B+ source.
9. Inspect terminals closely and correct fitment issues. Look for overheated plastic, darkened pins, green corrosion, or pushed-back terminals. Verify terminal tension with a mating pin test. Repairing the terminal often fixes repeat bulb failures and recurring open-circuit codes.
10. Wiggle-test the harness while monitoring live data and lamp operation. Use a scan tool snapshot during the wiggle test to capture the moment voltage or current changes. This step finds intermittent opens near the radiator support, headlamp mounting, or previous repair points.
11. Only after circuit proof, evaluate the module output stage. If power and ground drops stay normal, wiring integrity checks pass, and the lamp still misbehaves, test the output with a known-good load and verify the module command matches the physical output. Replace or code the module only when the tests isolate it.
12. Clear codes and confirm the repair. Cycle the ignition, run the output test again, and operate high beams repeatedly. A hard fault monitored by a comprehensive component strategy typically returns immediately on key-on, so an immediate clean rescan matters.

Professional tip: Treat 01495 as a load-monitoring problem, not a “bulb only” problem. Volkswagen lighting controllers often judge faults by current draw and expected voltage behavior. A terminal that looks clean can still fail under heat and load. Voltage-drop testing with the lamp commanded on finds the real issue faster than continuity checks.

Possible Fixes

• Reseat or replace the left high beam bulb after verifying poor contact: Correct installation and verified pin contact can resolve an open-circuit condition without further parts.
• Repair/replace the left headlamp connector or terminals: Restore terminal tension and eliminate heat damage or corrosion that creates an open under load.
• Repair damaged wiring and restore proper routing: Fix chafed sections, broken conductors, or rubbed insulation that caused an open or a short to B+.
• Clean and secure ground or return connections with verified low voltage drop: Correct a high-resistance ground/return path confirmed by voltage-drop testing.
• Repair fuse contact or power distribution fault: Address a loose fuse fit, oxidized fuse blades, or a compromised splice that drops voltage under load.
• Replace the Volkswagen control module only after circuit verification: If testing isolates an internal driver or sensing fault, replace and perform required coding/adaptation.

Can I Still Drive With 01495?

You can usually drive a 2013 Volkswagen Caddy with DTC 01495 stored, but you should treat it as a lighting safety fault. This manufacturer-specific Volkswagen code points to the left high beam circuit seeing an open circuit or a short to B+ (battery positive). If the left high beam does not work, night visibility drops and you may not meet roadworthiness rules. If the circuit shorts to B+, the high beam can stay on or act erratically. That can distract other drivers and create a legal issue. Limit night driving until you confirm proper high-beam operation and normal switch behavior.

How Serious Is This Code?

This code ranges from inconvenience to a real safety concern. It feels minor in daylight because the vehicle drives normally. It becomes serious at night, in rain, or on unlit roads. Loss of the left high beam reduces down-road illumination and increases fatigue. A short to B+ can also keep the lamp on and drain the battery. It can overheat wiring if resistance rises at a connector. Volkswagen lighting circuits often have bulb monitoring, so the module may log the fault quickly and disable the output to protect the circuit. Confirm the fault type using the FTB suffix when available. FTB 12 indicates short to battery. FTB 13 indicates open circuit.

Common Misdiagnoses

Technicians often replace the left high-beam bulb first and stop there. That wastes time when the module actually sees a short to B+ (FTB 12) or an open caused by terminal drag. Another common error involves blaming the headlamp switch. The switch may only request high beams, while the control module drives the lamp. Many Volkswagen platforms route headlamp power through a body controller. A poor ground at the lamp, corrosion in the connector, or a harness rub-through near the radiator support can mimic a bad bulb. Avoid guessing. Use a scan tool to command the output and measure voltage drop under load at the bulb connector before replacing parts.

Most Likely Fix

The most common confirmed repair direction involves restoring the circuit at the left headlamp assembly. Start with the bulb connector and the lamp ground path. Repair loose terminals, corrosion, or heat damage, then retest output control. If the FTB subtype indicates an open circuit (FTB 13), focus on continuity from the control module output to the bulb connector and ground integrity. If the subtype indicates short to battery (FTB 12), look for a harness short to a B+ feed or water intrusion in the headlamp connector that bridges terminals. Only consider module replacement after you prove correct wiring, loads, and commands.

Repair Costs

Repair cost depends on whether the confirmed root cause is wiring, connector condition, a sensor, a module, or the labor needed to diagnose the fault correctly.