air fuel ratio guage
 

ok i lost the directions on how to hook it up but i have the power going to the battery and i have it grounded and i have the blue wire inside the o2 sensor plug and now the guage won't turn off. i had it this way before and it was normal but now since i spliced a new plug on it hasn't turned off.


so my question is did i do it right or what did i do wrong?

hook it up not to the battery but to the, lights with the ignition so it only turns on when you turn the key on