when i do it when the car is off and the key is turned i can flip through all the test modes and all that...but when i have it on tach0000.0 or what ever when i turn it on....it erases turns into 888888 and then goes to my milage...why is this am i doing something wrong?
still not working.....maybe there is something wrong....everytime i start my car ...my guages go all the way and come back to to zero then back to idle...maybe low battery?
i think thats what they do when it comes into the test mode. ok
1) hold down the reset button
2) continue holding and start the car (holding button the whole time
3) keep holding the button once the car starts until the digital readout says 'test'