123+ bluetooth dizzy wiring question

[Pablo M]

In the midst of installing the dizzy.

Couple questions for those that have installed a 123+ Bluetooth, and bonus if it was on a 72 tii.

Background: 1972 2002tii, consulted with Sean at Blunttech (awesome dude, super helpful on many fronts) to get me the correct dizzy for my car. My car has red coil, and is stock.

I read many threads here on FAQ, read the install instructions on 123 website, watched the two YouTube videos commonly referenced in the previous info. 

 

Seeing conflicting directions on how to wire the three wires. The best info I can find, and how I have wired it is this:

Red- Pos on coil

Blue-Neg on coil

Black-direct to chassis ground

 

Questions:

1. Is that the correct orientation of the wires? On the 123 website says black direct to battery neg post. But everywhere else says just to ground. I assume its fine to ground. 

2. Assuming 1 is yes...Prior to turning ignition on and turning the dizzy to set the light, does the black not get connected (to chassis ground) or the blue (neg on coil)? If blue, does the black get connected or not. 

The more I read the more it seems the coil neg is the one not to be connected. One of the videos is not bluetooth so only has two wires, red and black, with black going to neg coil. And in that example, black is not connected. All other instructions say, "do not connect black wire", but on mine the black is chassis ground. 

 

Any help is greatly appreciated.

[dlacey]

The red wire is a continuous 12V supply for the 123 electronics (when ignition on). The black is a permanent ground for both the 123 electronics and also the coil (via the switching transistor inside 123).. grounding to the body near the dizzy should be fine (I used the coil mounting screw for the ground).  

I don't see any problem with connecting all three wires. I guess they may suggest leaving blue disconnected so there aren't High Tension sparks while the dizzy is being adjusted in that initial setup.

[Stevenc22]

Your black and blue are reversed.

 

Red and Black, run to the coil + & -. Blue ground to the chassis firewall with a bolt.

 

Edited April 10 by Stevenc22