Optronics MC-42RS
Optronics MC-42RS Double Bullseye Marker/Clearance Light User Manual
Model: MC-42RS
Product Overview
The Optronics MC-42RS Double Bullseye Marker/Clearance Light is designed for vehicle signaling and clearance applications. This light features a dual-bulb design for optimized light output and a durable, all-weather molded plastic housing. It is equipped with a snap-on, replaceable lens and easily changeable bulbs for convenient maintenance.

Figure 1: Front view of the Optronics MC-42RS Double Bullseye Marker/Clearance Light. This red light features two distinct bullseye lenses and a black base, designed for optimal visibility.
Specifications
| Model | MC-42RS |
| Brand | Optronics |
| Color | Red |
| Dimensions (L x W x H) | 1.38 x 3 x 5.63 inches |
| Weight | 2.4 ounces |
| Lens Material | Plastic |
| Special Features | Waterproof |
| Assembly Required | No |
| Mounting Centers | 3 inches (standard) |
Setup and Installation
The Optronics MC-42RS light is designed for straightforward installation.
- Preparation: Ensure the mounting surface is clean and free of debris. Verify that the vehicle's electrical system is compatible with the light's power requirements.
- Mounting: The light mounts on industry standard 3-inch centers. Align the mounting holes on the light with the pre-drilled holes on the vehicle surface.
- Wiring: Connect the light's power wire to the appropriate vehicle circuit. The light grounds through its mounting hardware. Ensure a secure and clean connection for proper grounding.
- Secure Installation: Use appropriate fasteners (not included) to securely attach the light to the mounting surface. Do not overtighten.
- Testing: After installation, activate the vehicle's lights to confirm the marker/clearance light is functioning correctly.
Note: Professional installation is recommended if you are unfamiliar with vehicle electrical systems.
Operating Instructions
The Optronics MC-42RS Double Bullseye Marker/Clearance Light operates in conjunction with your vehicle's existing lighting system.
- Activation: The light will illuminate when the vehicle's marker or clearance light circuit is activated, typically by turning on the vehicle's headlights or parking lights.
- Purpose: This light serves as a visual indicator of the vehicle's presence and dimensions, enhancing safety, especially during low-light conditions or adverse weather.
Maintenance
Regular maintenance ensures the longevity and optimal performance of your Optronics MC-42RS light.
- Cleaning: Periodically clean the lens with a soft cloth and mild soap and water. Avoid abrasive cleaners that could scratch the plastic.
- Bulb Replacement: The light features easily changeable bulbs. To replace a bulb:
- Gently pry off the snap-on lens.
- Carefully remove the old bulb from its socket.
- Insert a new, compatible bulb into the socket.
- Snap the lens back into place, ensuring it is securely seated.
- Lens Replacement: If the lens becomes damaged or discolored, it can be replaced. Follow the same steps as bulb replacement to remove the old lens and snap a new one into position.
- Inspection: Regularly inspect the light for any signs of damage, corrosion, or loose connections. Address any issues promptly to prevent further problems.
Troubleshooting
If your Optronics MC-42RS light is not functioning as expected, consider the following common issues and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Light does not illuminate |
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| Light flickers or is dim |
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| Lens is discolored or cracked |
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If problems persist after attempting these solutions, contact Optronics customer support or consult a qualified automotive technician.
Warranty Information
The Optronics MC-42RS Double Bullseye Marker/Clearance Light comes with a three-year warranty from the date of purchase. This warranty covers defects in materials and workmanship under normal use. It does not cover damage resulting from improper installation, accident, abuse, neglect, or unauthorized modification.
To make a warranty claim, please retain your proof of purchase and contact Optronics customer support.
Support and Contact
For further assistance, technical support, or inquiries regarding your Optronics MC-42RS light, please visit the official Optronics website or contact their customer service department.
- Manufacturer: Optronics
- Website: www.optronicsinc.com
- Customer Service: Refer to the Optronics website for current contact information.
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