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(4) Start connecting the items in the fuse circuit one at a time. When the fuse blows the circuit with TESTING FOR A VOLTAGE DROP (1) Connect the positive lead of the voltmeter to the side of the circuit closest to the battery (Fig. 6). (2) Connect the other lead of the voltmeter to the other side of the switch or component. (3) Operate the item. age between the two points. TROUBLESHOOTING WIRING PROBLEMS When troubleshooting wiring problems there are six steps which can aid in the procedure. The steps (1) Verify the problem. forming operational checks on components that are (3) Analyze the symptoms. Use the wiring dia- grams to determine what the circuit is doing, where (4) Isolate the problem area. proper operation of all items on the repaired circuit. SERVICE PROCEDURES WIRING REPAIR When replacing or repairing a wire, it is important that the correct gage be used as shown in the wiring (1) Disconnect battery negative cable the wire. (3) Place a piece of heat shrink tubing over one side of the wire. Make sure the tubing will be long (4) Spread the strands of the wire apart on each part of the exposed wire (example 1). (Fig. 7) (5) Push the two ends of wire together until the strands of wire are close to the insulation (example (6) Twist the wires together (example 3) (Fig. 7) type solder only. Do not use acid core solder. (8) Center the heat shrink tubing over the joint, and heat using a heat gun. Heat the joint until the (9) Secure the wire to the existing ones to prevent chafing or damage to the insulation (10) Connect battery and test all affected systems. Fig. 6 Testing for Voltage Drop Fig. 7 Wire Repair 1 – EXAMPLE 1 8W - 01 - 10 8W - 01 GENERAL INFORMATION XJ DIAGNOSIS AND TESTING (Continued) |