Splicing Twisted or Shielded Cable

Twisted/shielded cable is used in order to protect wiring from electrical noise. Two-conductor cable of this construction is used between the radio and the Delco-Bose® speaker/amplifier units and other applications where low level, sensitive signals must be carried. Follow the instructions below in order to repair the twisted/shielded cable.

Fig 1: View Of Outer Wiring Jacket
Courtesy of GENERAL MOTORS COMPANY
1. Remove the outer jacket(1). Use care not to cut into the drain wire of the mylar tape.
2. Unwrap the tape. Do not remove the tape. Use the tape in order to rewrap the twisted conductors after the splice is made.
Fig 2: Preparing The Splice
Courtesy of GENERAL MOTORS COMPANY
3. Prepare the splice. Untwist the conductors and follow the instructions for Splicing Copper Wire Using Splice Sleeves . Staggering the splices by 65mm (2.5in) is recommended.
Fig 3: Identifying Diode On Wire
Courtesy of GENERAL MOTORS COMPANY
NOTE:

Apply the mylar tape with the aluminum side inward. This ensures good electrical contact with the drain wire.

4. Re-assemble the cable.
   • Rewrap the conductors with the mylar tape. If the mylar tape is damaged, use 3M product AL-36FR to replace the damaged mylar tape.
   • Use caution not to wrap the drain wire in the tape(1).
   • Follow the splicing instructions for copper wire and splice the drain wire.
   • Wrap the drain wire around the conductors and tape with electrical tape to replace the outer insulation.
Fig 4: View Of Repaired Wire Covered With Electrical Tape
Courtesy of GENERAL MOTORS COMPANY
5. Tape over the entire cable. Use a winding motion when you apply the tape.