Basic info - '77 Chief, 360 with a Prestolite Distributor.
Ok, so I wired up the MSD Box and I am getting no spark. I used the diagram I found here on another thread and the MSD instructions. I used the original connector just so I didn't make a bunch of crimps and need to remove. Once done I will make a permanent connection.
So the power and ground to the battery is a no brainer. The orange went to coil positive and the black to the coil negative. For the switched hot I used the red wire from the original connector (see pic). I did not use the green wire from the original connector as it went to coil negative and I did not have a wire from the MSD box for it.
For the distributor I used the white and blue from the original connector (see pic).
In my mind the problem is on the coil. If the MSD wire took the place of the coil negative wire, should one or both of the existing wires be disconnected?
Any help would be appreciated.
Thank you