Quote:
Originally Posted by 1970 CST Short Wide
Tried the 1K resister and it made my tack go backwards
|
The purpose of the pull-up resistor is to change the +5v pcm tach signal to +12v - it worked for me on my Autometer tach. Sure you have the resistor in the correct direction - have no idea what it will do if not.
Here's a reference:
http://aeromotiveinc.com/wp-content/...leShooting.pdf