Aftermarket Cruise Control Installation Guide

Adding an aftermarket cruise control system to your vehicle can significantly improve driving comfort, especially on long journeys. Modern traffic often makes cruise control a desirable feature for maintaining consistent speeds and reducing driver fatigue. While many newer vehicles come equipped with this convenience, older models or base trims often lack it, making aftermarket cruise control installation a popular upgrade.

Why Consider Aftermarket Cruise Control?

An aftermarket cruise control system offers numerous benefits that extend beyond mere convenience. It can help you maintain a consistent speed, which is crucial for avoiding speeding tickets and adhering to posted limits. Furthermore, a steady speed often translates to better fuel efficiency, as it minimizes rapid acceleration and deceleration.

For drivers who frequently embark on highway trips, the ability to rest their foot and let the system manage speed can dramatically reduce strain. This makes long drives far more enjoyable and less tiring. The aftermarket cruise control market provides a range of options suitable for various vehicle types and driver preferences.

Types of Aftermarket Cruise Control Systems

Before beginning an aftermarket cruise control installation, it’s essential to understand the different types of systems available. Each type has its own installation requirements and compatibility considerations.

Vacuum-Operated Systems

These older systems use engine vacuum to actuate the throttle. They are generally simpler and more affordable, making them a good option for older vehicles without complex electronic systems. However, their performance can sometimes be less precise than electronic alternatives.

Electronic Systems

Electronic cruise control systems are more common today. They often connect directly to the vehicle’s electronic throttle control (ETC) or utilize a dedicated servo motor. These systems typically offer smoother operation and more precise speed holding.

Drive-by-Wire Systems

For vehicles equipped with electronic throttles (no physical cable between the pedal and engine), drive-by-wire cruise control systems are necessary. These integrate seamlessly with the car’s existing electronics, providing a factory-like feel. Aftermarket cruise control installation for these systems often requires specific wiring harnesses.

Pre-Installation Checklist

Thorough preparation is key to a successful aftermarket cruise control installation. Taking the time to gather everything you need and understand the process will save you time and frustration.

Gather Your Tools

You will typically need a basic set of automotive tools, including screwdrivers, wrenches, wire strippers, crimpers, and a multimeter. Having zip ties, electrical tape, and heat shrink tubing on hand is also advisable for securing wiring.

Read the Manual

Every aftermarket cruise control kit comes with a detailed instruction manual specific to its design and often for particular vehicle applications. Always read this manual thoroughly before starting. It will contain crucial wiring diagrams and mounting instructions.

Safety First

Before beginning any electrical work on your vehicle, always disconnect the negative terminal of the battery. This prevents accidental shorts and protects both you and your vehicle’s electrical system. Wear appropriate safety gear, such as gloves and eye protection.

Step-by-Step Aftermarket Cruise Control Installation

While specific steps vary by kit and vehicle, the general process for aftermarket cruise control installation follows a similar pattern.

Disconnect the Battery

As mentioned, this is your first and most critical safety step. Use a wrench to loosen and remove the negative battery cable.

Mount the Control Module

Find a secure, dry location under the dashboard or in the engine bay for the cruise control module. Ensure it’s away from excessive heat or moving parts. Use the provided brackets and hardware to mount it firmly.

Connect to Vehicle Speed Sensor (VSS)

The cruise control system needs to know your vehicle’s speed. This connection is typically made to the vehicle speed sensor (VSS) wire, often found near the transmission or within the vehicle’s main wiring harness. Consult your kit’s instructions and your car’s wiring diagrams.

Wiring the Controls

Install the cruise control switch or stalk in an accessible location, usually on the steering column or dashboard. Route its wiring carefully, avoiding any pinch points or areas of high heat. Connect these wires to the main control module according to the kit’s diagram.

Throttle Connection

This is a critical step. For cable-driven throttles, a servo motor typically connects to the throttle cable. For drive-by-wire systems, the kit will include a harness that splices into the accelerator pedal position sensor wires. Ensure all connections are secure and allow for full throttle movement without obstruction.

Brake and Clutch Switch Integration

The cruise control system must disengage when the brake pedal is pressed (and clutch pedal for manual transmissions). Splice into the brake light switch wires and, if applicable, the clutch switch wires. This safety feature is paramount for proper operation.

Testing and Calibration

Once all connections are made and the battery is reconnected, perform initial tests. Follow the kit’s calibration procedure, which often involves a short drive to allow the system to learn your vehicle’s characteristics. Test all functions: set, resume, coast, and most importantly, the brake disengage feature.

Common Installation Challenges

Aftermarket cruise control installation can present a few challenges. Wiring can be complex, especially if your vehicle’s specific diagrams are hard to find. Ensuring proper throttle connection and calibration is also crucial for safe and reliable operation. Sometimes, finding a suitable mounting location for the module or control switch can also be tricky.

If you encounter difficulties, double-check all connections against the wiring diagram. A multimeter can be invaluable for testing continuity and voltage. Don’t hesitate to consult online forums or seek professional advice if you’re unsure about any step.

Professional Installation vs. DIY

Deciding between a DIY aftermarket cruise control installation and professional help depends on your comfort level with automotive electronics and mechanics. If you have experience with wiring and are confident in following complex instructions, a DIY approach can save money.

However, if you’re new to car modifications or find the wiring diagrams daunting, professional installation is a safer bet. An experienced technician can ensure the system is installed correctly and safely, providing peace of mind and often a warranty on their work.

Conclusion

Aftermarket cruise control installation is a rewarding project that can significantly enhance your driving experience. By carefully following the steps outlined and prioritizing safety, you can successfully add this valuable feature to your vehicle. Enjoy the improved comfort and efficiency that a properly installed cruise control system brings to every journey.