How To Make Ram Tow Mirror Lights Stay On
The distinctive "eyebrow" lights on Ram tow mirrors are a popular feature, offering enhanced visibility and a rugged aesthetic. However, many owners find themselves wishing those lights could function not just as turn signals and marker lamps, but also as constant running lights. While from the factory they are typically only active during signaling or when the parking lights are engaged, there are several methods to achieve the "always-on" look. This article dives into the various approaches, from simple modifications to more complex wiring solutions, along with important considerations for safety and legality.
Understanding the Stock Tow Mirror Lighting
Before embarking on any modifications, it's crucial to understand how the factory tow mirror lights operate. Typically, they consist of two main functions: a side marker lamp, which illuminates when the parking lights or headlights are on, and a turn signal, which flashes when the corresponding turn signal is activated. The power for these functions is usually routed through the truck's wiring harness and controlled by the body control module (BCM). The BCM is essentially the brain of the vehicle's electrical system, managing various functions including lighting. Understanding this system is key to a successful and safe modification.
Methods for Achieving Constant Illumination
Several methods can be employed to keep the tow mirror lights illuminated continuously. These range from relatively simple wiring alterations to the use of aftermarket modules.
1. The "Tap-and-Splice" Method (Simple but Risky)
This is the most straightforward approach, involving tapping into a power source that's always on when the ignition is on. Commonly, the daytime running light (DRL) circuit or an ignition-switched fuse in the fuse box is used. This involves splicing a wire from the DRL or ignition fuse to the power wire for the tow mirror lights. While seemingly simple, this method carries several risks. Overloading the DRL circuit can cause it to fail, potentially affecting other critical lighting functions. Furthermore, improper splicing can damage the wiring harness and potentially void your vehicle's warranty. Always use proper connectors and ensure the gauge of the wire used is adequate for the current draw. It's generally not recommended without a thorough understanding of automotive wiring.
2. Using an Add-a-Fuse (Safer Alternative)
A slightly safer variation of the tap-and-splice method involves using an "add-a-fuse" or "fuse tap." This allows you to tap into an existing fuse slot in the fuse box without cutting or splicing any wires. Simply insert the add-a-fuse into the desired fuse slot, insert the original fuse into the lower slot of the add-a-fuse, and then insert a fuse for your new circuit into the upper slot. This provides a cleaner and more reliable connection than direct splicing. Still, it’s important to select a fuse slot that powers on with the ignition and won’t overload the circuit when the tow mirror lights are active.
3. Utilizing Aftermarket Modules (The Professional Approach)
The most reliable and safest method involves using an aftermarket module specifically designed to control tow mirror lighting. These modules typically connect to the truck's wiring harness and offer various programmable functions, including the ability to keep the tow mirror lights on as running lights. Some modules even offer features like dimming the lights at night to prevent glare. While more expensive than the other methods, these modules provide a clean, professional installation and minimize the risk of damaging the vehicle's electrical system. Brands like Diode Dynamics and Morimoto often offer such solutions.
Important Considerations: Safety and Legality
Before making any modifications, it's crucial to consider the safety and legality aspects. Ensure that the added illumination doesn't create excessive glare for other drivers, especially at night. Many jurisdictions have regulations regarding the brightness and color of vehicle lighting. Check your local laws to ensure that your modifications comply with these regulations. Excessive brightness can not only be illegal but also dangerous, potentially blinding oncoming drivers. Always prioritize safety over aesthetics.
Professional Installation
If you're not comfortable working with automotive wiring, it's highly recommended to have a professional install the modifications. A qualified automotive electrician can ensure that the wiring is done correctly and safely, minimizing the risk of damage to your vehicle. Furthermore, they can advise on the best method for your specific vehicle and ensure that the modifications comply with all applicable regulations. A small investment in professional installation can save you time, money, and potential headaches in the long run. Remember, the complexity of modern vehicle electrical systems makes DIY modifications risky without proper knowledge and experience.
Troubleshooting Common Issues
After installing any lighting modifications, be aware of potential issues. Flickering lights, blown fuses, and error messages on the dashboard are common indicators of problems. Always check your wiring connections, fuse ratings, and the functionality of the module (if used). A diagnostic scan tool can help identify any error codes related to the lighting system. If you experience any persistent issues, consult a qualified mechanic or automotive electrician.