How to Install a GPS Navigation System in a Car?
4 Answers
Pry open the edges of the storage box trim panel and remove it. Unscrew the screws under the storage box and use a pry tool to remove the decorative strip. Use a Phillips screwdriver to unscrew the screws on the central control panel. Support the main unit with both hands and remove it. Thread the dedicated power cable and DVD cable of the car navigation system through the middle of the two air vents and position the GPS antenna. Connect the main power and communication cables of the car navigation system, then connect the GPS antenna. Secure the car navigation system on top of the original CD main unit and tighten the fixing screws. Connect the DVD.
Installing a GPS navigation system by yourself is actually quite simple, and I really enjoy tinkering with these gadgets. First, pick a magnetic mount and stick it to the lower right corner of the windshield—it won’t block your view and allows easy angle adjustments. Tuck the power cable along the rubber seal at the top of the windshield, using a plastic pry tool to help guide it into the A-pillar trim when turning. Then, route it through the door seal straight to the cigarette lighter socket. For a cleaner look, you can directly connect it to the ACC power line, which requires removing the lower steering wheel cover to access the fuse box and using a multimeter to identify the positive and negative terminals. Finally, test the navigation software to ensure stable signals in both suburban and urban areas, and remember not to place the antenna near metal films to avoid GPS interference. The whole setup just needs a pry tool and a multimeter, and finishing it over a weekend feels incredibly rewarding.
I always go to a familiar auto repair shop technician to install my car navigation system. They've worked on various car models and know the wiring layout. For example, last time the technician first tested my head unit's compatibility before selecting the equipment. The mount was attached slightly to the right of the center on the windshield using 3M adhesive, making it extremely secure. The wiring was completely concealed: the technician tucked the cables into the gap by peeling back the edge of the headliner, ran them through the interior space of the passenger-side A-pillar, and connected them directly to the cigarette lighter socket below the glove compartment, with no visible wiring at all. The technician also used cable ties to secure the wiring harness to prevent rattling noises. The entire process took half an hour and cost 80 yuan. The key point is they know which areas have airbags and shouldn't be touched carelessly, and aftermarket equipment matching the original car's electrical system is also safer and more reliable.
When installing a navigation device, prioritize a stable power supply solution. Using the cigarette lighter for power is the simplest but occupies the port; connecting to the ACC power supply is more aesthetically pleasing but requires disconnecting the battery's negative terminal. Specific steps: Use a plastic pry tool to remove the trim panel below the steering wheel, locate the ACC fuse position controlled by the ignition switch, and confirm power with a multimeter before parallel wiring. Fix the GPS antenna at the top of the windshield away from metal areas, and route the wiring to avoid the airbag module path. During testing, focus on the cold start positioning speed—completing within 30 seconds in urban areas is considered acceptable. It is recommended to prepare a 10A spare fuse and check the voltage fluctuation of the car stereo after connection; exceeding 14V may damage the device. Metal car bodies can affect signals, so test reception strength by opening the window before installation in underground garages.
