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Answers
A fusible link is a special type of wire that protects a circuit that has constant high current requirements and must resist high surges in the circuit. The circuit between the alternator and battery is a good example of a circuit where a fusible link would be used. When a fusible link melts, the vehicle will normally not have any power whatsoever. A melted fusible link can be tricky to detect because the wire will melt, but the insulation may appear unaffected.