Mustang Mr. Mustang Battery Cable Set (1967) Installation Instructions

Tools Required:
  • 1/2 inch Wrench
  • 9/16 inch Wrench
  • 5/8 inch Wrench
  • Optional: Torque Wrench with 5/8 inch Socket
  • Optional: Drill & 1/4 inch Bit
Install Difficulty:
  • Easy
  • Easy Project
1. To start, you may wish to acquire this great resource for correct cable routing, part numbers, and schematics: The 1967 Mustang Electrical Assembly Manual.
Mustang Mr. Mustang Battery Cable Set Install Image
2. Then, once you've reviewed that, start the installation of your new Mustang Mr. Mustang 67-BC-ALL Battery Cable Set by disconnecting your battery cables. The 1967 coupe used in this example was initially purchased with many of the engine components, including most of the cabling, completely missing or already removed.
3. Place the end of the starter cable with the heat shield onto the stud near the top of the starter and tighten the nut down on top of it with a 1/2 inch wrench.
Mustang Mr. Mustang Battery Cable Set Install Image
4. The starter cable runs through the Mustang starter cable solenoid bracket. This bracket is held on by the bolt attaching the motor mount to the engine block. If you do not have a bracket in this location, remove the bolt from the motor mount, furthest from the front, with a 5/8 inch wrench or socket. Then, install the bracket and reinstall the bolt, torquing it to 25-40 ft-lb (shop manual specs). The electrical assembly manual only shows one cable bracket here. However, you can install a second bracket on the other motor mount bolt to secure the cable better. After installing bracket, snake the cable through the bracket.
5. The other end of the starter cable bolts to the right post on the Mustang starter solenoid. Tighten the nut down over the cable with a 1/2 inch wrench. This completes installation of the starter cable.
Mustang Mr. Mustang Battery Cable Set Install Image
6. Next, attach the Mustang battery's red positive cable to the left post of the starter solenoid and tighten down with a 1/2 inch wrench, as shown in the picture in Step 5.
7. Bolt the negative battery cable to the engine block in the same location where the alternator harness is grounded to the engine block. This bolt required a 9/16 inch wrench. A few notes: I did not use the factory correct location for these cables, as I did not have the correct size bolt immediately available. Also, the Mustang alternator is not in place in this picture.
Mustang Mr. Mustang Battery Cable Set Install Image
8. Install two S clips to secure the cables, which are part of the Mustang wiring harness retainer kit. One clip snaps to the battery apron, just under the starter solenoid, while the second clip snaps to the battery apron, just to the lower right of the battery tray. If you have a new, reproduction battery apron, like the one pictured, the holes may not be drilled out large enough or exist at all. I found a 1/4 inch hole was the right size for my reproduction clips. Run the cables through the clips and snap the clip shut. Note that the starter cable is not shown going through the top clip in the electrical assembly manual.
Mustang Mr. Mustang Battery Cable Set Install Image
9. This shows the final routing of the battery cables. The negative cable runs behind the battery and comes out over the top, where it is clamped to the negative battery terminal. The positive cable is then clamped to the positive terminal (the positive terminal sits closest to the solenoid). The battery has not yet been purchased for this car. The installation of the Mustang Mr. Mustang Battery Cable Set is now complete.
Mustang Mr. Mustang Battery Cable Set Install Image