Mustang UPR Battery Relocation Kit (1965-2015) Installation Instructions

Tools Required:
  • 1/2-inch Wrench
  • 9/16-inch Wrench
  • 5/16-inch & 7/16-inch Sockets
  • 10mm Socket
  • Ratchet
  • 1/8-inch Drill Bit
  • 3/4-inch Drill Bit
  • 1/4-inch Drill Bit
  • 3/8-inch Drill Bit
  • Drill
  • Wire Cutters
  • Wire Strippers
  • Plastic Ties
  • Jack & Jack Stands
Install Difficulty:
  • Moderate
  • Moderate Project
1. To start the installation of your new Mustang UPR 9005 Battery Relocation Kit, use 9/16-inch wrench to remove negative battery cable. Use 1/2-inch wrench to remove the positive battery cable.
2. Remove the bolt for the Mustang battery hold down with a 5/16-inch socket and pull the battery out of the engine bay.
3. Use a 7/16-inch socket and remove the bolt which holds the battery tray in the Mustang engine compartment. Use a 10mm socket and remove the side bolt which also holds the tray. Pull the tray out.
Mustang UPR Battery Relocation Kit Install Image
4. Jack up the rear of the vehicle and place jack stands under the car, near the mounting points for the Mustang rear control arms or on the rear axle tubes.
Mustang UPR Battery Relocation Kit Install Image
5. Loosen the two bolts holding the fuel tank straps and the 10mm bolts holding the filler neck to the body of the car. Also remove the 10mm bolt holding the safety bracket which holds the underside of the filler neck to the tank.
Mustang UPR Battery Relocation Kit Install Image
6. Disconnect the wiring to the Mustang fuel tank and the vapor line from the fuel tank. Place a jack under the fuel tank then remove the bolts holding the fuel tank straps.
Mustang UPR Battery Relocation Kit Install Image
7. Choose a location in the trunk to mount the battery box. Remember that you will be drilling at least two holes through the floor of the Mustang trunk area.
Mustang UPR Battery Relocation Kit Install Image
8. Place the bottom of the UPR box in the car and mark where the two holes meet the floor of the trunk. Drill two 3/8-inch holes into the floor of the trunk.
Mustang UPR Battery Relocation Kit Install Image
9. Slide each of the threaded rods through each hole. When the rods are through the bottom of the box for the Mustang battery and trunk floor, place a washer and 3/8-inch nut on the bottom of each rod on the underside of the car.
10. On the inside of the car, place another washer and 3/8-inch nut onto each of the rods and tighten it down to the battery box bottom. Adjust the nuts on top and below the car so that the rods aren’t sticking more underneath the car then they need to. Tighten all nuts with a 9/16-inch wrench.
Mustang UPR Battery Relocation Kit Install Image
Mustang UPR Battery Relocation Kit Install Image
11. Use the supplied screws and 10/32-inch nuts to assemble the sides of the battery box.
Mustang UPR Battery Relocation Kit Install Image
12. Place the sides on the battery box and place the lid on top so that the rods stick through the holes in the lid. Mark the rods so that there is just enough room to place a washer and nut on each rod above the lid.
Mustang UPR Battery Relocation Kit Install Image
13. Remove the rods and cut them to length.
Mustang UPR Battery Relocation Kit Install Image
14. Locate a good spot to attach the ground cable for the battery. Also find a route for the positive battery cable from the battery box to the starter solenoid in the engine bay. If you choose to route the cables under the car you must drill two 3/4-inch holes. Use grommets to place in the holes.
Mustang UPR Battery Relocation Kit Install Image
Mustang UPR Battery Relocation Kit Install Image
Mustang UPR Battery Relocation Kit Install Image
15. Feed the positive battery cable to the engine bay and to the Mustang starter solenoid. If running the cable under the car, keep the cable away from heat and attach it to the body securely with zip ties.
Mustang UPR Battery Relocation Kit Install Image
Mustang UPR Battery Relocation Kit Install Image
16. Attach the supplied plastic vent to the side of the battery box using the pre-cut hole and plastic washer.
Mustang UPR Battery Relocation Kit Install Image
17. Mark a spot in the trunk floor where you want the plastic vent tube to run from the vent and through the floor. Drill a 1/2-inch hole through the floor of the trunk and feed the supplied plastic tube through the hole.
18. Attach the plastic tube to the plastic vent nozzle.
Mustang UPR Battery Relocation Kit Install Image
Mustang UPR Battery Relocation Kit Install Image
19. Place the Mustang battery into the battery box. Slide the supplied hold down bar onto the threaded rods and down onto the battery. Place a washer and nut onto each rod and tighten them down to the hold down bar.
20. Use wire strippers to strip the Mustang positive battery cable. Tighten the cable into the supplied terminal. Secure the positive and negative battery cables onto the battery.
Mustang UPR Battery Relocation Kit Install Image
21. Put the gas tank back into place reversing the steps you took to detach it and bring it down.
22. Peel off all the protective wrap and place the lid on the battery box. Secure the lid by putting a washer and nut on each threaded rod. Start the vehicle to make sure everything is wired up, and you've completed the installation of your new Mustang UPR Battery Relocation Kit.
Mustang UPR Battery Relocation Kit Install Image