Hardwiring a Garmin GPS navigation unit can help eliminate the wires running along your dashboard or dangling from your windshield. Doing so allows the device to turn on and off with the rest of the car's electronics, so it will also save you the annoyance of having to plug the device in and out. The hardwiring procedure can be easily tackled in a weekend, requiring a couple hours of your time.
- Skill level:
- Moderately Easy
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Things you need
- Garmin hardwire cable
- Set of wrenches
- Electrical tape
Park your Civic on a level surface, open the bonnet, then locate the car's battery. The location will slightly vary depending on your Civic's year and trim level, but it will likely be somewhere inside the engine bay.
Disconnect the two cables connected to the positive and negative terminals of your Civic's battery.
Mount your Garmin GPS inside your Civic using a windshield or dashboard mount. These mounts are available through your GPS device manufacturer and allow you to mount the unit on directly on your dashboard or via a suction-cup mount that attaches it to your windshield.
Plug the Garmin hardwire cable and run it along your dashboard until you are able to tuck in the cable's head between the dashboard panel and the car. Just as there are cables which run from your dashboard to your engine, the Garmin hardware cable will need to run from your car's interior to the engine bay.
Locate an opening in your Civic's firewall, which is the material which protects the engine bay from the passenger compartment. There are numerous small openings which you can feed the cable through; they are used at the factory to run wiring from the engine bay to the dashboard.
Feed the power cable through the opening in your firewall until you have the end of the cable near the positive terminal of your Civic's battery. You can often find openings in your firewall by following electrical cables underneath your dashboard that travel towards the front of the car. The positive terminal on your battery will be indicated by a "+" sign directly on the battery's casing.
Wrap the positive wire coming out of the power cable around your battery's positive terminal, then wrap the negative wire coming out of the power cable around the battery's negative terminal.
Reconnect the positive and negative terminal cables that were originally connected to your battery and tighten them using wrenches from your wrench set, then close your bonnet to complete the procedure.
Tips and warnings
- Be careful when working with your car's electronic system. Be sure to disconnect the battery so that there is no electrical current travelling through your car's system so you can safely handle the wiring.
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