[trularin]

On # 3, you need to make sure the ground is a real good ground.

Connect the 12V to 12V and the signal goes to either the contact for the distributor or the TACH output from your ignition box.

Your brake lights are wire backwards. This may sound a bit strange, but is the brake switch a "Normally open" or "Normally closed"? You can read across the switch to see if there is little or no resistance ( this means it is "Normally closed" ). With the Ohm meter across the switch, press the brake. The Ohm meter should change. You need to make these readings with the battery disconnected.

Anyway, mail us back with the type of switch you are using. We can go from there.

Hope this helps.