I'm looking for the tach wire

O

oldfox

Member

Feb 19, 2009

234

6

18

Mar 15, 2011

#1

• Mar 15, 2011

• #1

Hi, I'm changing over to an old school blower with a carb and I would like to keep factory tach working. I will be running a Mallory distributor with a blaster coil and a MSD 6-BTM box. I'm hoping to hook in at the -side of the coil.
anyone know right off where I can pick up the tach wire? I think it runs to the negative side of the stock coil-- but not sure.
Help? Thanks

 

Kdubslugga

Active Member

Jun 7, 2003

1,515

3

38

Akron, OH

Mar 15, 2011

#2

• Mar 15, 2011

• #2

i believe its the green wire coming off the ignition coil.

 

D

DonMaximo

Member

Sep 25, 2003

217

5

19

Lewisville, Texas

Mar 15, 2011

#3

• Mar 15, 2011

• #3

Yes, Negative side of coil

-OR-

You can tap into the signal which feeds your factory tach:
which would be the Dark/Green & Yellow wire for an 87-89 Mustang.
or Pin #11 (tan & yellow) on the left side cluster connector for 1990-1993

 

HISSIN50

"How long does it take to get help in here?

15 Year Member

Nov 29, 1999

31,179

33

129

Mar 15, 2011

#4

• Mar 15, 2011

• #4

If using a box, you would probably not want to tap into the neg side of the coil (multiple sparks affect the reading).

 

A

Animal-Mother

New Member

May 1, 2010

1

0

0

Mar 20, 2011

#5

• Mar 20, 2011

• #5

Which wire off the harness would I be hooking up to the distributor in an '83 Mustang? I recently put in an HEI style distributor and want my tach working again.