Texas Carbon offers two LED shift light display options across our custom carbon fiber steering wheel lineup: the Base LED Display and the Premium LED Display. This guide covers what the display does, how it is powered, how the wireless OBD2 module works, how to use the settings menu, and why we recommend professional installation.
What the LED Display Does
The LED shift light display is built directly into your Texas Carbon carbon fiber steering wheel. It is part of the wheel itself, not a separate add-on. The system combines LED shift lights with a center display screen, placing a clear readout right on the wheel.
The display shows live vehicle data such as RPM and vehicle speed, and the shift lights flash at an RPM point you choose. Using the on-wheel settings menu, you can select which data to show, set your shift light RPM, and change the LED colors to match your build.
1. Base vs Premium LED Display
Both display options are built specifically for Texas Carbon LED steering wheel setups, and both rely on the same core requirements to function correctly.
- Base LED Display: the standard LED shift light display option.
- Premium LED Display: the upgraded option, with more shift light LEDs, a slightly brighter output, and more detailed graphics on the center screen.
- Both options show the same vehicle data and perform the same functions.
- Both require proper power, ground, and OBD2 data to function correctly.
- This guide applies to all Texas Carbon LED shift light displays across our lineup, not only one vehicle platform.
The difference between the two is visual. Both display the same data and work the same way, so it comes down to looks. If you want the best-looking display, go with the Premium. If you are happy with the standard look, the Base performs identically.
2. How the LED Display Gets Power
The LED shift light display has two wires:
- Red wire: 12V power
- Black wire: ground
The red wire must be connected to an ignition-switched 12V power source, meaning power that is only present while the ignition is on. It should not stay powered when the vehicle is off. Connecting it to a constant battery source that stays live with the vehicle off can drain the battery or damage the LED module.
Verify the power source with a multimeter before connecting it. Wire color alone should not be trusted.
3. Ground Connection
The black wire is the ground wire, and it must be connected to a verified ground point.
- We recommend tapping into a confirmed ground wire already present in the steering wheel harness. Grounding directly to the steering wheel itself is also an option.
- The ground point should be verified before final assembly.
- A poor ground can cause the display to fail to power on, flicker, or work inconsistently.
4. Recommended Installation Approach
Texas Carbon strongly recommends professional installation for LED steering wheel setups. The installation requires identifying the correct ignition-switched 12V power source and a proper ground. Because vehicle harnesses can vary by year, trim, and factory options, this should be verified with a multimeter instead of guessed.
- A professional installer should use a multimeter to locate a working ignition-switched 12V wire.
- The ideal power source is a fused ignition-switched circuit confirmed by testing.
- The installer should confirm the source receives power when the ignition is on, and does not receive power when the ignition is off.
- The installer should verify the ground before final assembly.
- Customers should not guess based on wire color, online videos, or another vehicle’s wiring.
For the wire connections themselves, use properly crimped connectors sealed with adhesive-lined heat-shrink tubing. The steering wheel area sees movement and vibration, and a clean crimp protected by heat shrink holds up better there than solder alone, which can stiffen and crack over time.
- Strip the wires and join them with a quality crimp connector, such as an adhesive-lined heat-shrink butt connector, then seal the connection.
- When tapping into an existing switched 12V or ground wire, cut the wire and use a butt or step-down crimp connector rather than a quick-splice or T-tap connector. T-tap and “vampire” connectors can cut wire strands and work loose, and are not recommended for a permanent install.
- Make sure the finished connection is secured so it cannot rub against metal or come loose with steering wheel movement.
5. Wireless OBD2 Data Module
Each LED display system includes a small black wireless OBD2 module. The module plugs into the vehicle’s OBD2 port and sends vehicle data wirelessly to the LED display. The module is plug-and-play, so there is nothing to pair or configure. Once it is plugged in, it connects to the display automatically.
- The display uses this data to show readouts such as RPM and vehicle speed, along with other data you can select.
- The available readouts can vary slightly between modules. You can browse and choose which data to display in the settings menu.
- The display needs both power/ground and the OBD2 module to work fully. Power and ground turn the display on; the OBD2 module supplies the vehicle data.
- Because the OBD2 module only receives power when the ignition is on, it will not drain the battery while the vehicle is off.
With power connected but the OBD2 module unplugged, the display will still boot up. You will see the left and right buttons lit in purple. The module must be plugged into the OBD2 port for live vehicle data to appear while driving.
6. Why Texas Carbon Does Not Provide One Universal Wiring Video
We understand customers often want one exact wiring video. Texas Carbon builds custom steering wheels for a wide range of platforms, including Mustang, Camaro, Corvette, Mopar, and F-150, with more added over time. Across that many vehicles, plus the span of model years and generations within each one, there is no single universal steering wheel harness. A wiring video that is correct for one vehicle may be incorrect for another.
- Wiring details can vary across vehicles, generations, model years, trims, and factory option packages.
- Even within the same platform, wiring harnesses can change over the production lifespan.
- Following a video intended for a different vehicle can cause confusion and increase the risk of incorrect wiring or damage.
What every installation needs is the same on every vehicle we build for: a verified ignition-switched 12V power source and a solid ground. Rather than publish a separate video for each vehicle, we provide this universal guide that explains exactly what the display requires. The specific wire locations should be confirmed on your vehicle with a multimeter, which is why professional installation is recommended.
7. Basic Power-On Checklist
Use this checklist to confirm the basics before and during testing:
- Confirm the red wire is connected to a verified ignition-switched 12V source.
- Confirm the 12V source receives power when the ignition is on.
- Confirm the 12V source does not remain powered when the ignition is off.
- Confirm the black wire is connected to a verified ground.
- Confirm the wireless OBD2 module is plugged into the OBD2 port.
- Confirm the vehicle ignition is on during testing.
- Confirm no wires are pinched, loose, exposed, or shorting.
- If the display does not power on, stop and have the wiring checked by a professional installer.
Do not continue applying power if there is a burning smell, visible damage, heat from the module, flickering caused by loose wiring, or signs of a short.
8. LED Display Settings Menu
Once the LED display is installed and powered in the vehicle, you can adjust settings through the display menu, which is intuitive to navigate.
- To enter the settings menu, long press the right-hand button.
- To exit the settings menu, long press the left-hand button.
- Inside the menu, you can choose which vehicle data is shown, set your shift light RPM, and change the LED colors.
- For example, you can change the shift light flash point from 4,000 RPM to 7,000 RPM inside the settings menu.
In most installs, the wiring is the most technical part of the process. Once the display is powered on, the settings are quick to adjust.
9. Important Electrical Warning
LED modules are electronic components and must be wired carefully. Incorrect power, incorrect ground, exposed wires, reverse polarity, shorting, or tapping the wrong circuit can damage the LED module.
- Do not allow the red power wire to contact ground.
- Do not allow exposed wiring to touch metal components.
- Do not test the module by applying random power.
- Do not wire the module directly to a battery or to any constant power source that stays live while the vehicle is off.
Texas Carbon strongly recommends installation by a qualified professional. The customer and installer are responsible for proper installation. See our Disclaimer for full installation and liability terms.
10. Testing Before Shipping
Every LED module is tested during manufacturing and again before shipment to confirm it works before it leaves Texas Carbon.
11. Refund / Replacement Eligibility
LED modules damaged by incorrect installation, improper wiring, shorting, reverse polarity, wrong power source, exposed wiring, customer negligence, or installer error may not be eligible for refund or replacement.
- Texas Carbon reviews these situations case by case.
- Any refund, replacement, or exception decision is made at Texas Carbon’s sole discretion.
- Customers may be asked for photos, videos, install details, wiring photos, order number, and installer notes.
If your order arrives damaged, do not install it. Document the damage and contact us within the reporting window listed in our Refund Policy.
For full eligibility, timelines, and reporting windows, see our Refund Policy. For installation and liability terms, see our Disclaimer.
12. When to Contact Support
- For product questions before ordering, contact support@texascarbon.co.
- For order-specific help, include your order number.
- For LED troubleshooting after delivery, include your order number, vehicle year/make/model/trim, photos of the current steering wheel, photos or videos of the LED behavior, and wiring/install details.
Texas Carbon can help review the information you provide, but we cannot diagnose every vehicle’s wiring remotely. When wiring or electronics are involved, we may recommend professional inspection.
Frequently Asked Questions
What is the difference between the Base and Premium LED Display?
The difference is visual. The Base LED Display is the standard option, and the Premium LED Display is the upgraded option, with more shift light LEDs, a slightly brighter output, and more detailed center-screen graphics. Both display the same vehicle data and perform the same functions. Both require proper ignition-switched 12V power, ground, and the wireless OBD2 module.
Is the LED display built into the steering wheel?
Yes. The LED shift light display is built directly into the Texas Carbon steering wheel. It is part of the wheel itself, not a separate accessory.
Can I wire the LED display directly to the battery?
No. The LED display should not be wired to a constant battery source that remains powered when the vehicle is off. It should use an ignition-switched 12V source so the display only receives power when the ignition is on.
Will the LED display work without the OBD2 module?
The display needs proper power and ground to turn on. With power connected but no OBD2 module plugged in, it will boot up and show the left and right buttons lit in purple, but it will not show live vehicle data. The OBD2 module provides the data needed for full function, so it should be plugged into the OBD2 port and the vehicle should be on for proper operation.
What information does the display show?
The display shows live vehicle data such as RPM and vehicle speed, along with additional readouts. The available data can vary slightly between modules, and you can choose which readouts to show in the settings menu.
What happens if the LED module is damaged during installation?
LED modules damaged by incorrect installation, improper wiring, shorting, wrong power source, reverse polarity, exposed wiring, customer negligence, or installer error may not be eligible for refund or replacement. Texas Carbon reviews these cases at its sole discretion. See our Refund Policy and Disclaimer for details.
Questions Before Ordering?
If you have questions about LED display options before ordering, contact Texas Carbon support before placing your order.
For order-specific questions, email support@texascarbon.co with your order number.
For LED troubleshooting, include your order number, vehicle year/make/model/trim, photos or videos of the issue, and any available installation details.
For all store policies, including shipping, returns, and terms, see our Policies page.