green.
The 1999 Jeep Cherokee ignition coil used a black wire for the negative wire. The negative wire should be on the left post.
If that 66 Mustang still has the original ignition system and the wire feeding the tach from the negative side of the ignition coil is shorted to ground, then yes the car won't run.
You can check for an instruction sheet at the manufacturer's website, but most tachs have a black wire for ground, a red wire that is hot, a white wire that is hot, and a green wire that goes to the negative or tach terminal of the coil.
its part of your distributor cap. hope this might help.
red (+) wire to possitive side of coil- Black (-) wire to negative side of coil. thats it.
assuming it is a older car with points the distributor goes to the negative side of the coil
Hook it to the negative side of the coil.
need to know where to hook coil wire is all i need to know.
the big red one. really.
The positive speaker wire is a solid color, your negative wire should have a stripe on it.
the green is the signal wire and it goes to the negative side of the ignition coil
The green wire from the tach goes to the negative side of the coil.