Top Light 90143 for HM124: Fitting and Wiring Basics
By BEZGAR | Published: 2026-11-01
Category: How-to Guides
Learn how to fit the BEZGAR Top Light 90143 to your HM124 and handle the wiring basics correctly, with clear steps to avoid common mistakes.
Quick answer
Fit the BEZGAR Top Light 90143 by first test-fitting it to the HM124 body, then routing and connecting the wiring before securing the light permanently. Check alignment and wire clearance at each stage.
Why the 90143 is a direct-fit part for the HM124
The Top Light 90143 is an original BEZGAR spare part made specifically for the HM124 model. That means the mounting points and body contours are designed to match, so you avoid the trimming and guesswork that come with universal lights. However, because the HM124 has different body versions and optional accessories, always dry-fit the light before committing to any holes or adhesive.
Wiring basics for RC car lights
RC car lighting systems typically run on the same battery that powers the vehicle, but the exact voltage and connector type depend on your HM124's setup. The 90143 light is designed to work with the HM124's lighting system, but you should confirm the connector matches your receiver or power source. If the light does not include a plug that matches your car, you may need to solder or use an adapter—check the product listing for included hardware. Keep wiring away from moving parts and hot components, and use heat shrink or tape to secure connections.
When to replace instead of repair
If your existing HM124 top light is cracked, dim, or intermittent, replacement is usually more reliable than repair. The 90143 is a genuine spare, so it restores original fit and function. If the light is simply loose or has a bad connection, check the wiring and mounting first—those are often easier fixes than replacing the whole unit.
Step-by-step fitting and wiring
- Dry-fit the light: Place the 90143 light on the HM124 body without securing it. Check that the mounting holes or tabs align with the body and that the light sits flush. Common mistake: forcing the light into place can crack the lens or strip mounting points. If the fit is tight, do not force it—check for obstructions or a different body version.
- Plan the wire route: Before mounting, decide how the wires will run from the light to the power source. Keep them away from moving parts like suspension arms and away from the motor or ESC. Use existing wire clips or small zip ties to secure the route. Common mistake: routing wires where they can be pinched by the body or caught in gears. Leave a small service loop near the light so you can remove the body without straining the wires.
- Connect the wiring: Plug the light into the appropriate port on your HM124's receiver or lighting controller. If the connector does not match, use an adapter or solder a compatible plug, observing correct polarity. Common mistake: reversing polarity can damage the LED or the receiver. Test the light before final mounting—if it does not light, check the connection and polarity first.
- Secure the light: Once the wiring is tested, fasten the light using the original screws or adhesive recommended for the HM124. Tighten screws gently to avoid cracking the plastic. Common mistake: over-tightening screws can strip threads or damage the light housing. After securing, gently tug the light to confirm it is firmly attached.
- Final check: Reconnect the battery and test the light through its full range (if applicable). Check that wires are clear of moving parts and that the body can be removed without pulling on the wires. Common mistake: skipping the final check can lead to a short circuit or a light that fails during a run. If the light flickers, recheck the connections and wire routing before your first drive.
Product facts
- Top Light(90143) for HM124: Original BEZGAR spare part, item number 90143, designed for a precise fit on the HM124 model. Ensures compatibility with the HM124 body and lighting system, reducing installation hassle.
Top Light(90143) for HM124
