Tach Installation ?\'s for 85 Tried to install an AutoMeter Monster Tach last night and ran into a problem. One of the wires is supposed to be run from the Tach to the negative terminal of the starter coil. On my rig, the coil is part of the distributor cap and sits right on top. After removing the cover I found three wires: red, yellow, and black(seems to be a ground wire). Since red usually means positive and the instructions said connect it to the negative, I was about to just hook it up to the yellow wire. I just wanted to check with you guys first before I short anything out. Has anyone else done this before? BLAZE IT UP!!!