fusible link. Fusible links are used in circuits which are not ordinarily refused, such as a starting or ignition circuits.
Although the fusible links appear to be a heavier gauged in the wires there protecting, the appearance is due to the thick insulation. All fusible links are for wire gauge is smaller than the wire there designed to protect. Fusible links cannot be repaired, but a new link of the same amperage rating can be installed the procedure is as follows
Disconnect the negative cable from the remote battery terminal. Disconnect the fusible link from the component at the eyelid terminal connection. Cut the damage fusible link out of the wiring just behind the current connector. Stripped insulation back approximately 1 inch spread the strands of the exposed wire apart, pushed them together and twist them in place. If available, this connection may be made using another crimp type connector. Use rosin core type solder and solder the wires together it to obtain a good connection. Use plenty of electrical tape around the solder joint. No wires should be exposed. Connect the fusible link eyelid terminal to the component and tighten the screws securely connect the negative cable to the remote battery terminal. Test the circuit for proper operation
Some basic diagnostic procedures