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• Ohmmeter - Used to check the resistance between two points of a circuit. Low or no resistance CAUTION: Most of the electrical components used • Probing Tools - These tools are used for probing terminals in connectors (Fig. 5). Select the proper INTERMITTENT AND POOR CONNECTIONS Most intermittent electrical problems are caused by faulty electrical connections or wiring. It is also • Connectors are fully seated • Spread terminals, or terminal push out • Terminals in the wiring assembly are fully seated into the connector/component and locked into • Dirt or corrosion on the terminals. Any amount of corrosion or dirt could cause an intermittent problem • Damaged connector/component casing exposing the item to dirt or moisture • Wire insulation that has rubbed through causing a short to ground • Some or all of the wiring strands broken inside of the insulation • Wiring broken inside of the insulation TROUBLESHOOTING WIRING PROBLEMS When troubleshooting wiring problems there are six steps which can aid in the procedure. The steps factory items added to the vehicle before doing any (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. check for proper operation of all items on the STANDARD PROCEDURE STANDARD PROCEDURE - ELECTROSTATIC All ESD sensitive components are solid state and a symbol (Fig. 6) is used to indicate this. When han- (1) Always touch a known good ground before han- dling the part. This should be repeated while han- (2) Avoid touching electrical terminals of the part, unless instructed to do so by a written procedure. (3) When using a voltmeter, be sure to connect the ground lead first. (4) Do not remove the part form it’s protective packing until it is time to install the part. (5) Before removing the part from it’s pakage, ground the pakage to a known good ground on the Fig. 5 PROBING TOOL 1 - SPECIAL TOOL 6801 Fig. 6 ELECTROSTATIC DISCHARGE SYMBOL 8W - 01 - 8 8W-01 WIRING DIAGRAM INFORMATION PT WIRING DIAGRAM INFORMATION (Continued) |