1997 Cadillac Seville STS Q&A

1997 Cadillac Seville STS Question: In order to hook up a taxi meter, which wire on the speed sensor is the pulse?

I intend to connect the meter lead at the sensor connector. There is a yellow and a purple wire. -
Answer 1
the right way is to use a meter to look at wave pattern. one wire is 5v ref and the other is signal -