How to install a head unit
Peter Sitkowski | 15th Oct 2023 | 5 minutes to read
Upgrading your car’s head unit is a great way to enhance your driving experience, allowing access to modern smartphone technology, enhanced HD radio, and Bluetooth connectivity.
While the process for installing a new head unit might seem daunting, it only requires a few simple tools and a bit of know how to get your old system out and a new and improved one put in.
Below we’ve got all the major steps and tools you’ll need for the job:
Preparing To Install Your Head Unit
Before you embark on this installation journey, you’ll need to gather the necessary tools and materials to make sure the job is done properly.
Purchasing the Right Head Unit
Begin by selecting a head unit that suits your preferences and vehicle compatibility. Universal head units come in two standard sizes based on the stereo’s chassis, with Single-DIN head units being 5cm tall and around 18cm wide, while Double-DIN stereos are 10cm x 18cm. Note that all head units aren’t the same, so use our Rego Search function to find the correct fitment for your vehicle if you aren’t sure.
Wiring Harness Adapter
To make the installation smoother, purchase a wiring harness adapter that matches your vehicle's make and model. It simplifies the wiring process, ensuring a secure connection.
Tools Required
- Screwdrivers — You'll need Phillips and flathead screwdrivers for removing and attaching panels, as well as securing the head unit in place.
- Crimping Tool and Crimp Connectors — These tools are essential for connecting wires securely and preventing electrical issues.
- Wire Stripper — A wire stripper is necessary for removing insulation from the wires and ensuring a clean connection.
- Panel Removal Tools — These tools help you safely remove interior panels and trim without damaging them.
- Socket and Ratchet Set — Use these tools to remove any bolts or screws that may be securing the old head unit.
- Electrical Tape — Electrical tape can be used to secure wires and prevent them from coming into contact with metal surfaces.
Preparing the Vehicle
Now that you have everything you need to install the new head unit, it’s time to get your vehicle ready to set it up.
Disconnect the Vehicle Battery
Prior to any installation work, disconnect the negative terminal of the vehicle's battery. This is essential to prevent any electrical accidents during the installation process.
Remove the Old Head Unit
Begin by carefully removing any panels or trim that obstruct access to the head unit. Use your panel removal tools to prevent damage. Once you have clear access, unscrew, and remove the old head unit. Remember to keep track of the screws and other fasteners for reinstallation later.
Wiring Preparation
Identify the wires coming from the new head unit and the wiring harness adapter. Use the wire stripper to strip a small section of insulation from the wires, then use crimp connectors to secure them together. Make sure to connect wires of the same colour, ensuring a proper match between the head unit and your vehicle's wiring.
Installing the New Head Unit
Now for the installation process itself
Connect Wiring Harness
Plug the wiring harness adapter into the vehicle's wiring, ensuring a snug and secure fit. Then, connect the other end of the adapter to the new head unit's wiring. This step is crucial for establishing proper electrical connections.
Secure the Head Unit
Carefully slide the new head unit into the designated slot, ensuring it fits snugly. Reattach any screws or bolts that hold the head unit in place. Make sure it's secure but not overly tightened, as this could damage the unit or the dashboard.
Reattach Panels and Trim
Reattach the panels and trim pieces you removed earlier. Press them firmly into place to ensure a snug fit and reinsert any clips or fasteners as necessary.
Reconnect the Vehicle Battery
With the head unit securely in place and all panels reattached, reconnect the negative terminal of the vehicle's battery. This will restore power to the car and activate the new head unit.
Testing and Fine-Tuning
Time to make sure all your hard work didn’t go to waste by testing your new head unit.
Turn On the Vehicle
Start your vehicle and power on the new head unit. Verify that it functions correctly and displays the necessary information.
Test Audio Output
Play some audio through the new head unit to check for proper sound output. Ensure that all speakers are functioning as expected.
Adjust Settings
Explore the settings menu on the head unit to customise the audio settings, such as equaliser settings, balance, and fade, to your liking.
Pair Devices
If your new head unit has Bluetooth capabilities, pair your smartphone or other devices for hands-free calling and audio streaming.
Certain head units let you use Apple CarPlay to control your music, navigation, take phone calls.
Final Tips and Considerations
Here are some other things you might want to think about once you have finished installing your head unit.
Secure Loose Wires
Ensure that any excess wiring is neatly bundled and secured with electrical tape or zip ties. Loose wires can be a safety hazard and cause rattling noises.
Consult the User Manual
If you encounter any issues or need to fine-tune specific settings, refer to the user manual provided with your new head unit. It contains valuable information and troubleshooting tips.
Professional Installation
If you're uncertain about any aspect of the installation or if it involves complex vehicle-specific features, consider seeking professional installation services to ensure a safe and efficient installation process.
Top Head Unit Brands at Repco
Installing a modern head unit in your car, SUV, or 4x4 is one of the best things you can do to make long trips more bearable and make the most out of interior accessories that require Bluetooth. If you’re after top quality head units from brands like Pioneer, JVC, Axis, and Kenwood, head into your local Repco store or shop online using our Rego Search function to get the right head unit fitment for your vehicle.
