Repairing Bus Wiring
WARNING: This page is about a different car, the 2001 Lincoln Town Car. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION:
When battery is disconnected, vehicle computer and memory systems may lose memory data. Driveability problems may exist until computer systems have completed a relearn cycle. See COMPUTER RELEARN PROCEDURES article in GENERAL INFORMATION before disconnecting battery.
NOTE:
Following procedure must be used to ensure proper repair is performed on communication network wiring. Communication network wiring is sensitive to moisture and oxidation and must be properly sealed to ensure proper operation of the module communications network. Single element heat shrink tubing is NOT sufficient, heat shrink tubing containing hot melt adhesive is required.
- When performing a repair on the Standard Corporate Protocol (SCP) bus wiring, ensure the wires are twisted at a rate of 33-40 winds per 3.3 ft. (1 m). Twists should start approximately 4.9" (124 mm) from any connector. Use only 20 AWG standard wire gauge for repairs.
- If performing a splice in the wiring. Disconnect negative battery cable. Strip .75" (19.0 mm) of insulation from one wire and 1.50" (38.1 mm) of insulation from the other wire. Perform STEP 1 in illustration. See Fig 1. Place Raychem SCT® Heat Shrink Tubing (ESB-M99D56-A2) or equivalent over one wire.
- Twist stripped portion of the wires together. Solder connection using rosin core mildly activated solder. DO NOT use acid core solder. Bend wires to allow installation of heat shrink tubing. Perform STEP 2 in illustration. See Fig 1.
- Position heat shrink tubing over splice area. Using heat gun, evenly heat the heat shrink tubing until adhesive flows from both ends of heat shrink tubing.