Factory Tach and MSD AL6 connection

[Afirehawk1]

There is a grey wire that goes to the Tach i think
I read this but little confusing
Any thoughts where to connect when running a factory tach

[The Rocknrod]

To a tach filter, then to the tach input wire?

[Afirehawk1]

Originally Posted by The Rocknrod

To a tach filter, then to the tach input wire?

Greek to me
Says trigger wire
Im better at following a wire diagram

[Afirehawk1]

Originally Posted by Afirehawk1

Greek to me
Says trigger wire
Im better at following a wire diagram

Also what is best location for these 2 wire from the MSD box
Again i have a factory tach in place

[The Rocknrod]

So looking at an online wire diagram (correct part number?). Looks like the red is a power lead and the gray is a tach feed. However there is a red ignition feed.
So my guess would be that the two wires bundled together would be ignition and tach.
(The reason I said tach filter is the pulses may not work for the older model tachs. Try it without the filter first then).

If your going points here is the diagram, not sure of your part number though:

[Afirehawk1]

Originally Posted by The Rocknrod

So looking at an online wire diagram (correct part number?). Looks like the red is a power lead and the gray is a tach feed. However there is a red ignition feed.
So my guess would be that the two wires bundled together would be ignition and tach.
(The reason I said tach filter is the pulses may not work for the older model tachs. Try it without the filter first then).

If your going points here is the diagram, not sure of your part number though:

Ok so i found this on page 5 of 24 in the instructions.
2 large wires red and black appear to be power feeds.
I think i figured that out

The small red and grey are the 12v ignition and the Tach trigger wire.

Its the grey trigger wire.
Where exactly does this connect to??

[The Rocknrod]

I would think the Tach trigger is what sends the tachometer the pulses that make it read how many RPM there is.
Dont confuse that with a Crank Trigger.

[Afirehawk1]

Originally Posted by The Rocknrod

I would think the Tach trigger is what sends the tachometer the pulses that make it read how many RPM there is.
Dont confuse that with a Crank Trigger.

I understand
But Where does it physically connect?

[jayoldschool]

There are typically four connections on a tach:
- power
- ground
- illumination
- signal

Connect grey to signal.

[Afirehawk1]

Originally Posted by jayoldschool

There are typically four connections on a tach:
- power
- ground
- illumination
- signal

Connect grey to signal.

Oh now i see it
Much appreciated!