Whenever you purchase a Chinese made digital speedometers, rest assured there will be no operating manual and or specific pin out of the wiring where it goes and what color of wirings are for. More often they intend to mislead user the global standard color of wire for automotive purposes. But if a technician like me will test it. Whether no manual. It will work as shown on the last part of this article.
The Speedometer in test was this type and it is very cheap. I bought it on an online shopping store. It arrived and as usual, there is no manual. Just the unit and the connector. Even if it will be searched on the web. There is no wiring diagram of this speedometer.
Trial and error is highly risky. So if u have no wiring diagram of this speedometer. You wont be able to make it work properly. But there is always a way.
Of course worldwide web is free. But how to make it work is not. You all know the drill of YOUTUBE.....Subscribe, hit the notification bell, share and make it go up where it belong and when it reach the target. Guess the Pin out will come out.
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