What additional wiring is needed for the 187b to display vehicle information?
2 Answers
187b displays vehicle information with protocol wiring. Here are the detailed specifications: 1. Introduction 1: The 187b itself does not have the function to display vehicle information and requires a protocol box. The forward version comes with its own protocol, and installing the 187B only requires connecting two protocol wires. With protocol support, the 187b can display reversing trajectories, indicate which specific door is not closed, and synchronize some information from the instrument panel onto the 187b. 2. Introduction 2: The 187b can use Apple CarPlay and Baidu Carlife to achieve in-car mapping functions. Baidu Maps can display traffic conditions and navigation routes in great detail. The Bluetooth interface is more user-friendly, allowing for voice dialing. After connecting to CarPlay, the main page becomes the phone page, and Siri can read messages, make calls on behalf of the user, etc.
When modifying the Volkswagen 187B system, I often encounter issues with displaying vehicle information, mainly due to the lack of wiring for vehicle network connectivity. Typically, a CAN bus line needs to be added and connected to the vehicle's gateway module or OBD diagnostic port, which allows the system to read real-time data such as speed and fuel consumption. It is recommended to use a dedicated decoder harness to avoid direct wire cutting and prevent short circuits. Specific steps: First, disconnect the vehicle power, remove the center console panel, locate the interface on the back of the head unit, insert the CAN harness, and connect the other end to the gateway or OBD port. After testing the wiring for firmness, reconnect the power, and the system will automatically recognize and display the information. This process requires careful circuit protection, as incorrect wiring may damage electrical components. It's best to have a multimeter on hand to check voltage matching. I often see fellow car enthusiasts facing issues due to neglecting harness quality—switching to a high-quality harness usually solves the problem, enhancing driving monitoring while ensuring safety and peace of mind. I recommend selecting compatible parts from professional online stores for DIY installation.
