• Mustang Forums
  • 1965 - 1973 Classic Mustangs -General/Talk-

Rally-Pac Wiring

  • Thread starter Thread starter Sparksteam
  • Start date Start date Oct 14, 2025
S

Sparksteam

New Member
Sep 18, 2025
4
0
1
California
Oct 14, 2025
#1
  • Oct 14, 2025
  • #1
I have a Rally-pac on my mustang which isn't working. I suspect that the wire that needs to connect to the distributor side of the ignition coil isn't connected. But when I look at the wire colors coming from the rally-pac, they don't seem to match any rally-pac diagrams I see online. I believe the harness is factory. Is anyone familiar with this rally-pac wiring? If so, can you verify if the current connections are correct, and can tell my which wire needs to connect to the coil? The loose red wire in the picture was connected to the green connector.



Thanks.
 

9T02R

Member
Jul 24, 2025
13
16
13
San Diego
Oct 15, 2025
#2
  • Oct 15, 2025
  • #2
Sparksteam said:
I have a Rally-pac on my mustang which isn't working. I suspect that the wire that needs to connect to the distributor side of the ignition coil isn't connected. But when I look at the wire colors coming from the rally-pac, they don't seem to match any rally-pac diagrams I see online. I believe the harness is factory. Is anyone familiar with this rally-pac wiring? If so, can you verify if the current connections are correct, and can tell my which wire needs to connect to the coil? The loose red wire in the picture was connected to the green connector.



Thanks.
Click to expand...
Two reds from the Rally Pac? This graph may help. It is possible the tac has failed. Mine has. Brian
 

Attachments

  • 65 Rally Pac Pink Wire.webp
    114.9 KB · Views: 66
S

Sparksteam

New Member
Sep 18, 2025
4
0
1
California
Oct 15, 2025
#3
  • Oct 15, 2025
  • #3
9T02R said:
Two reds from the Rally Pac? This graph may help. It is possible the tac has failed. Mine has. Brian
Click to expand...
Thanks Brian! Yeah, it IS over 35 years old. But, the wire colors just don't make sense. I will video the current behaviour when I run it again today. If I could make sense of the wires, I could try to figure out how to test the tach. Thanks again!
 
You must log in or register to reply here.

Similar threads

rally pac
  • WORTH
  • Apr 6, 2025
  • Classic Mustang Specific Tech
Replies
1
Views
211
Classic Mustang Specific Tech Apr 6, 2025
All Stock93
C
Electrical HELP! 1989 5.0 Stick, Voltage Bleed onto Ignition Trigger wire
  • ChickenDeluxe
  • May 14, 2026
  • Fox 5.0 Mustang Tech
Replies
7
Views
169
Fox 5.0 Mustang Tech May 24, 2026
ChickenDeluxe
C
M
67 Mustang Ignition Switch Wiring Diagram needed
  • Michaelell
  • Sep 14, 2025
  • 1965 - 1973 Classic Mustangs -General/Talk-
Replies
2
Views
367
1965 - 1973 Classic Mustangs -General/Talk- Jan 3, 2026
Michaelell
M
Electrical 91 hatch wiring help needed
  • FastDriver
  • Apr 7, 2026
  • Fox 5.0 Mustang Tech
Replies
2
Views
134
Fox 5.0 Mustang Tech Apr 8, 2026
FastDriver
F
Spark Plugs Caused Rough Idle & Driving
  • firevert
  • Sep 1, 2025
  • 2005 - 2009 Specific Tech
Replies
3
Views
368
2005 - 2009 Specific Tech Sep 3, 2025
Noobz347
Share:
Bluesky Email Share Link
  • Mustang Forums
  • 1965 - 1973 Classic Mustangs -General/Talk-
Menu
Log in

Register

  • Forums
  • What's new
  • Media
  • Resources
  • Contact
  • Sponsor
X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?

X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?