Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSFORD1997CROWN VICTORIA BASE, 4.6 WREPAIR AND DIAGNOSIS (SINGLE PAGE)BODY & FRAMEBODY, CAB CONTROL SYSTEMSMODULE COMMUNICATIONS NETWORK SYSTEMDESCRIPTION & OPERATIONREPAIRING BUS WIRING
1997 Ford Crown Victoria Base, 4.6 W
Repairing Bus Wiring
1997 Ford Crown Victoria Base, 4.6 WSECTION Repairing Bus Wiring
NOTE:
Following procedure must be used to ensure proper repair is performed on BUS wiring. BUS wiring is sensitive to moisture and oxidation and must be properly sealed to ensure proper operation of the module communications network. Regular heat shrink tubing is NOT sufficient, heat shrink tubing containing hot melt wax is required.
- When performing a repair on the BUS wiring, ensure the wires on the BUS are twisted at a rate of 33-40 winds per 3.3 ft. (1 meter). The twists should start within approximately 4.9" (124 mm) from any connector. Use only 20 AWG standard wire gauge for repairs.
- If performing a splice in the wiring, strip .75" (19.0 mm) of insulation from one wire and 1.50" (38.1 mm) of insulator from the other wire. Perform STEP 1. See Fig 1. Place hot melt wax type heat shrink tubing over one wire.
- Twist stripped portion of the wires together. Solder connection using resin core RMA solder. DO NOT use acid core solder. Bend wires to allow installation of heat shrink tubing. Perform STEP 2. See Fig 1.
- Position heat shrink tubing over splice area. Using heat gun, evenly heat the heat shrink tubing until wax flows from both ends of heat shrink tubing.
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.