How to connect wires: Red cable connect to power +12V Black cable connect to power ground Green cable connect to rotate signal Yellow cable connect to fuel signal Power positive connect to the power swtich +. Rotate signal connect to the ignition output positive. How to test rotate speed: 1. Connect the power + and -. 2. Switch on the power with bike key. You will see the number is 0000. Then use the speed signal to touch the power +. The display will change number now. That means it works. 3. Connect the signal wire. 4. Start on the engine. It will work now. How to test fuel meter: 1. Connect the power + and -. 2. Swtich one the power with bike key. The display will show one LED. Then connect the signal wire to negative. LED will be all on. That means it works. 3. Connect the signal wire. (Do not use with original fuel meter together.) Top up the fuel and adjust the resistance to let all LED on. After run out of fuel, adjust the resistance again to let only one LED on. It's ok now!
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