12V DC Car Rearview Camera Power Filter Rectifier | KKMOON

12V DC Car Rearview Camera Power Filter Rectifier

Struggling with a jittery, flickering, or black screen when you engage reverse gear? The KKMOON 12V DC Power Filter Rectifier is a compact, plug-and-play solution designed specifically for German and American car models that output unstable, pulse-riddled voltage to the reversing light circuit. By converting that noisy signal into a clean, stable 12V DC supply, this filter ensures your rearview camera operates correctly every time you shift into reverse.

Made in Mainland China.

Why Your Rearview Camera May Show Interference

Certain German and American vehicle models superimpose a square-wave pulse signal on top of the reversing light's power supply. When a backup camera draws power directly from this line, the unstable voltage causes screen warping, severe image interference, flickering, or a completely black display. This rectifier filters and stabilizes that signal so your camera receives clean DC power.

Key Features

• Stabilized 12V DC Output — Converts unstable, pulse-interfered reversing-light power into a steady, reliable DC supply for your rear camera.
• Eliminates Screen Warping & Black Screens — Resolves common display issues caused by voltage interference on German and American car platforms.
• Ultra-Compact Design — Measures just 4.8 × 2.6 × 1.5 cm (1.9 × 1.0 × 0.6 in), weighing only ~17 g; fits neatly in any tight installation space.
• Durable Plastic Housing — Black housing protects internal components from moisture and vibration.
• Simple 4-Wire Installation — Color-coded wires make connection straightforward — no special tools required.
• Professional-Grade Construction — High-quality components for consistent, stable performance.

Specifications

Installation Guide

• Input Red Wire → Reversing Light Positive Pole
• Input Black Wire → Reversing Light Negative Pole
• Output Red Wire → Camera Positive Pole
• Output Black Wire → Camera Negative Pole

Note: German vehicles generally do not require the black output wire to be connected. Most American vehicles can connect all four wires. This filter is designed exclusively for German and American car series that produce pulsed signal interference — it is not effective on vehicles without this type of interference.

What's in the Box

• 1 × 12V DC Power Filter Rectifier

For more information on automotive electrical safety and best practices, visit the U.S. Consumer Product Safety Commission (CPSC).

Frequently Asked Questions

Q: Which vehicles is this 12V DC power filter rectifier compatible with?

A: This rectifier is specifically designed for German and American car series (such as certain BMW, Mercedes-Benz, Audi, Ford, and GM models) that are known to output pulse-modulated voltage on their reversing light circuits. It is not effective on vehicles that do not have this type of signal interference, so please confirm your vehicle's electrical characteristics before purchasing.

Q: Will this filter fix a black screen or flickering image on my backup camera?

A: Yes — if the root cause is unstable or pulse-interfered voltage from the reversing light supply (common on compatible German and American models), this rectifier stabilizes the power to deliver clean 12V DC to your camera, resolving screen warping, severe image interference, flickering, and black-screen issues.

Q: How difficult is it to install this rearview camera power filter?

A: Installation is straightforward. The unit uses four color-coded wires: connect the input wires to your vehicle's reversing light positive and negative terminals, then connect the output wires to your backup camera's positive and negative power leads. No special tools or advanced electrical knowledge are needed.

Q: Is the black output wire always required?

A: Not always. For German vehicles, the black output wire typically does not need to be connected. For most American vehicles, all four wires should be connected. Refer to your specific vehicle's wiring diagram if you are unsure.