Quote Originally Posted by Mr. KiDD
If its anything like the EFs, the speedo cable comes out of the transmission, and goes into the back of the Gauge Cluster. it runs through the firewall.

The TACH gets its signal from the Crank Position Sensor or the Cam Position Sensor depending on the year of the car.
My tach I found out, gets its signal from the neg. side of the coil. And the speedo does go into the firewall and screws into the back of the speddometer in the cluster (like you said). But my tach isn't working and the wire is ran to the correct spot. Later, QD.