B1582 – OBD-II DTC

OBD-II DTC B1582 – Dim Panel Increase Input Circuit Short To Ground

DTC B1582 meaning

DTC B1582 refers to a diagnostic trouble code indicating a short to ground in the dim panel increase input circuit. This code is specific to the vehicle’s body control module (BCM) and relates to the functionality of the dimming feature for the instrument panel lights. When the BCM detects an unexpected low voltage signal in the circuit, it triggers this code to alert the technician of a potential issue.

DTC B1582 symptoms

Common symptoms associated with DTC B1582 may include:

• Instrument panel lights not functioning or dimming improperly
• Inconsistent brightness of dashboard lights
• Warning lights illuminated on the dashboard
• Possible malfunction of other related electrical components

DTC B1582 causes

Several factors can lead to the occurrence of DTC B1582, including:

• Short circuit in the dim panel increase input circuit
• Damaged wiring or connectors in the circuit
• Faulty body control module (BCM)
• Corrosion or poor connections at the circuit terminals

DTC B1582 seriousness

The seriousness of DTC B1582 can vary. While it may not pose an immediate safety risk, it can lead to visibility issues at night due to improper instrument panel lighting. Additionally, if left unaddressed, it may indicate underlying electrical problems that could affect other vehicle systems.

How to diagnose DTC B1582

To diagnose DTC B1582, follow these steps:

1. Use an OBD-II scanner to confirm the presence of the code.
2. Inspect the wiring and connectors associated with the dim panel increase input circuit for damage or corrosion.
3. Check for continuity in the circuit to identify any shorts to ground.
4. Test the body control module for proper operation and any related fault codes.

How to fix DTC B1582 step-by-step instructions

To fix DTC B1582, follow these steps:

1. Disconnect the vehicle’s battery to ensure safety while working on the electrical system.
2. Inspect and repair any damaged wiring or connectors in the dim panel increase input circuit.
3. Test the circuit for continuity and ensure there are no shorts to ground.
4. If necessary, replace the body control module if it is found to be faulty.
5. Reconnect the battery and clear the DTC using an OBD-II scanner.
6. Test the instrument panel lights to ensure proper functionality.

How to erase DTC B1582

To erase DTC B1582, follow these steps:

1. Connect an OBD-II scanner to the vehicle’s diagnostic port.
2. Access the trouble codes menu on the scanner.
3. Select the option to clear or erase trouble codes.
4. Confirm the action and wait for the scanner to complete the process.
5. Disconnect the scanner and start the vehicle to check if the code reappears.

Recommended tools for OBD-II diagnostics

Explore our expert picks: The Best OBD2 Scanners for 2025

Easy-to-use Multimeter for reliable diagnostics: AstroAI Auto-ranging Multimeter

Some of the links on this page may be affiliate links, which means we may earn a small commission if you make a purchase. This helps us keep our DTC database up to date and provide valuable content for free. We only recommend products that we have tested and believe to be the best in their class.