Sorting another wire mess 77

[Nditiz1]

So I'm going through the wires on my 77 to get ready for this 3.0. There was a previous hack job from a 912E conversion. I was wondering if someone could help me identify some wires I had circled.

The second thing I need answered is if this purple/black (tach wire) should be going into this CDI plug. The T14 wire diagram shows the the purple/black goes into pin 12. Is my 77 supposed to have it coming through this plastic connector since it had originally been a 3 pin Permatune CDI? Can I just pull this out and run it to the T14?

Thanks for the help all.

1.?
2.?
3.?
4.?

[Walter_Middie]

The second thing I need answered is if this purple/black (tach wire) should be going into this CDI plug.

I think your 77 should be very similar to my 75. On mine, the white plastic connector includes both the +12 volts switched through the ignition that goes to the CDI box (3 pin) and the purple tach signal wire.

[Nditiz1]

Thanks Walter!

Now, does anyone know how to rewire that plug so it hooks up to a 3.0?

[Walter_Middie]

From your picture:
1.) This red wire goes to your #5
2.) Brown - I think this is the ground to the case of the CDI
3.) I don't have a yellow with stipe - not sure
4.) Not sure on this one either
5.) This connector goes to the coil. 2 reds and a black. A red and the black goes to the coil, and the other red wire is your #1.

[Nditiz1]

Thanks Again!

Yeah so it looks like I can get rid of/don't need 1. since that would go to a capacitor.

You didn't convert your 75 to a 3.0 did you

[timmy2]

2 wires to swap for a 3.0 in a ‘77

The Purple/black in the 3.0 engine harness at T14(12) needs to go to your #5 (T2) along with the red for CDI power.

The brown/red currently in the 3.0 harness at T2 needs to go to your #4 brown/black for the air flow safety switch to kill the fuel pump.

The rest is for other stuff at the fuse panel.

[Nditiz1]

Originally Posted by timmy2

2 wires to swap for a 3.0 in a ‘77

The Purple/black in the 3.0 engine harness at T14(12) needs to go to your #5 (T2) along with the red for CDI power.

The brown/red currently in the 3.0 harness at T2 needs to go to your #4 brown/black for the air flow safety switch to kill the fuel pump.

The rest is for other stuff at the fuse panel.

Thanks Timmy2!!!

Since the harness in my engine bay already needs a new male pin T14 can I just make the adjustment on the car harness instead of the engine?

[timmy2]

You could do it that way.
Extend the tach wire purple/black to reach pin 12 on the 14 pin connector and then move the brown/black wire to T2 with the red for the CDI power and safety switch.

[Nditiz1]

Originally Posted by timmy2

You could do it that way.
Extend the tach wire purple/black to reach pin 12 on the 14 pin connector and then move the brown/black wire to T2 with the red for the CDI power and safety switch.

I think this is the correct config

[timmy2]

You got it.

[Nditiz1]

Thanks Dennis!

I'm going to assume wires #2 and #3 are not needed?