How To Get A Remote Start For Car

So, you're thinking about adding remote start to your ride? Excellent choice! Remote starters add a ton of convenience, especially in harsh climates. This article will guide you through the process, focusing on understanding the wiring and core components involved. We'll cover everything from basic functionality to troubleshooting, equipping you with the knowledge to tackle this project confidently. We'll be focusing on aftermarket remote start systems, as factory systems often integrate deeply with the vehicle's computer and are significantly more complex to install or modify.

Purpose of Understanding the Remote Start System

Why bother understanding the intricacies of a remote start system? Because knowledge is power, especially when dealing with electrical systems. This knowledge empowers you to:

Install with Confidence: Avoid costly mistakes and ensure a reliable installation.
Troubleshoot Like a Pro: Diagnose and fix problems quickly, saving time and money.
Customize Your System: Add features and tailor the system to your specific needs.
Understand Security Implications: Properly integrating a remote start requires careful attention to security bypass modules to prevent theft.
Learn About Automotive Electrical Systems: This is a great stepping stone to understanding more complex automotive electrical repairs and modifications.

Essentially, understanding the system's workings transforms you from a mere installer to a knowledgeable technician.

Key Specs and Main Parts

Let's break down the core components of a typical aftermarket remote start system:

Remote Start Module: This is the brain of the operation. It receives signals from the remote, interprets them, and controls the vehicle's starting system. Key specs include operating voltage (typically 12V DC), current draw, and supported vehicle types (e.g., gasoline or diesel).
Remote Control (Fob): Sends the start/stop commands to the remote start module. They operate on radio frequencies (RF) and can have varying ranges. Consider the number of buttons and range when selecting one.
Wiring Harness: The network of wires that connects the remote start module to various points in the vehicle's electrical system. Wire gauge (thickness) is crucial; use the recommended gauge for each connection to prevent voltage drop and overheating.
Hood Pin Switch: A safety switch that prevents the vehicle from starting remotely if the hood is open. This is crucial for safety and required for most systems to function correctly.
Brake Switch Input: Another crucial safety feature. The remote start system monitors the brake pedal position. Pressing the brake pedal disengages the remote start and hands control back to the driver.
Tachometer Input (Tach Wire): (Often optional) This wire connects to the vehicle's tachometer signal, allowing the remote start module to monitor engine RPM. This helps prevent over-cranking by shutting off the starter motor when the engine starts. Many newer vehicles use data interfaces instead of a tach wire.
Security Bypass Module: This is critical for most modern vehicles. It temporarily bypasses the vehicle's anti-theft system (immobilizer) during remote start. These modules often require programming specific to the vehicle. Incorrect installation or programming can compromise vehicle security.
Antenna: Receives the RF signal from the remote control. Placement is important for maximizing range.

Key Specs to Consider:

Operating Voltage: Almost always 12V DC in passenger vehicles.
Current Draw: The amount of electrical current the module consumes when idle and active.
RF Frequency: The frequency used by the remote control (e.g., 433MHz, 900MHz).
Range: The maximum distance the remote control can communicate with the module.
Vehicle Compatibility: Ensure the system is compatible with your vehicle's make, model, and year.

Understanding Wiring Diagram Symbols

Deciphering a wiring diagram is essential for a successful installation. Here's a breakdown of common symbols:

Solid Lines: Represent wires. The thickness often indicates the wire gauge (thicker lines = thicker wires).
Dashed Lines: Typically represent connections within a module or non-essential wiring.
Colors: Wires are color-coded. Refer to the diagram's legend to identify each color's function (e.g., red = power, black = ground). Always verify wire color and function with a multimeter.
Circles: Represent connections (splices or terminations).
Squares/Rectangles: Represent components like relays, switches, and modules.
Ground Symbol (⏚): Indicates a connection to the vehicle's chassis ground.
Battery Symbol (+/-): Indicates the positive (+) and negative (-) terminals of the vehicle's battery.
Arrowheads: Indicate the direction of current flow.
Connector Symbols: Represent multi-pin connectors. These are often labeled with pin numbers.

The wiring diagram will specify which wires from the remote start module need to be connected to specific wires in the vehicle. Common connections include:

Ignition Wire: Provides power to the vehicle's ignition system when the remote start is activated.
Starter Wire: Activates the starter motor.
Accessory Wire: Powers accessories like the radio and climate control system.
Parking Light Wire: Flashes the parking lights to indicate remote start activation.
Door Lock/Unlock Wires: (Optional) Allows remote locking and unlocking of the doors.

How It Works: The Remote Start Sequence

Let's walk through the sequence of events that occurs when you press the "start" button on the remote:

Signal Transmission: The remote control sends an RF signal to the antenna connected to the remote start module.
Module Activation: The remote start module receives the signal and verifies its validity (e.g., checks for a valid security code).
Safety Check: The module checks the hood pin switch and brake switch input to ensure the hood is closed and the brake pedal is not pressed. If either condition is not met, the remote start sequence is aborted.
Security Bypass: The security bypass module is activated, temporarily disabling the vehicle's immobilizer. This allows the engine to start without the key being present in the ignition.
Ignition Activation: The remote start module activates the ignition wire, providing power to the vehicle's ignition system.
Accessory Activation: The accessory wire is activated, powering accessories like the radio and climate control system.
Starter Activation: The starter wire is activated, engaging the starter motor and cranking the engine.
Engine Monitoring: If a tach wire is connected, the remote start module monitors engine RPM. Once the engine starts, the module deactivates the starter wire to prevent over-cranking. If no tach wire is used, the system cranks for a pre-programmed duration.
Run Time: The engine runs for a pre-programmed duration (e.g., 15 minutes).
Shutdown: The engine shuts down automatically after the run time expires, or if the brake pedal is pressed.

Real-World Use: Basic Troubleshooting

Here are some common problems and troubleshooting tips:

Remote Start Not Working: Check the battery in the remote control. Verify that the hood is closed. Check the fuse for the remote start module.
Engine Cranks But Doesn't Start: The security bypass module may not be programmed correctly or malfunctioning. Double-check your connections and programming procedures. Also ensure the immobilizer is disabled during the remote start sequence.
Engine Starts and Immediately Shuts Off: The tach wire (if used) may not be connected correctly or the signal may be incorrect. The system might be detecting an over-rev condition. If no tach wire is used, the module might be set for the wrong vehicle type (e.g., diesel instead of gasoline).
Short Range: Try repositioning the antenna. Ensure there are no obstructions between the remote control and the antenna.
Parking Lights Not Flashing: Check the connection to the parking light wire. Verify that the parking lights are functioning properly.

Using a Multimeter: A multimeter is your best friend for troubleshooting electrical problems. Use it to check for voltage at various points in the circuit, verify continuity of wires, and measure resistance. Always disconnect the battery before working on electrical systems to prevent short circuits.

Safety: Highlighting Risky Components

Working with automotive electrical systems can be dangerous. Here are some critical safety considerations:

Airbag Systems: Never tamper with airbag wiring. Accidental deployment can cause serious injury. Disconnect the battery and wait at least 15 minutes before working near airbag components.
Fuel System: Avoid working near fuel lines or fuel system components. Gasoline is highly flammable.
Electrical Shorts: Prevent short circuits by disconnecting the battery before working on electrical systems. Use insulated tools and avoid touching exposed wires.
Incorrect Wiring: Connecting wires incorrectly can damage the vehicle's electrical system or the remote start module. Always double-check your connections before applying power.
Security Bypass: Improper installation or programming of the security bypass module can compromise vehicle security, making it easier to steal the vehicle. Follow the manufacturer's instructions carefully and consider having the system installed by a professional if you are not comfortable with the process.
High Current Wires: Pay close attention to the gauge (thickness) of wires carrying high current, like the starter wire and ignition wire. Using undersized wires can cause overheating and fire.

Important Note: This information is for educational purposes only. Remote start systems can be complex, and improper installation can damage your vehicle or create safety hazards. If you are not comfortable working with automotive electrical systems, it is best to have the system installed by a qualified professional.

Now that you understand the fundamentals, you're in a much better position to install or troubleshoot a remote start system. Remember to always prioritize safety and double-check your work. Happy modding!

We have a detailed wiring diagram available for download. This diagram provides a comprehensive overview of a typical aftermarket remote start system, including wire colors, connection points, and component locations. It's an invaluable resource for anyone tackling this project. Contact us for the file.