I know that fusible links on GM cars come directly off of the starter positive terminal. They can be identified by looking for a cylindrical (3/4" long by 1/2" in diameter) barrel of plastic on a colored piece of wire. If the technician pulls on a fusible link which is about 8" long (replacement), then the wire insulation will stretch by about 1" to 3" indicating the wire inside has broken.
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I looked up fusible link on the 1999 Dodge Ram and came up with this information which is a little bit different as far as form factor:
Fusible Links
Removal & Installation
All Engines
To Remove:
NOTE: If a generator cartridge fuse fails, be certain to inspect and test the vehicle charging system before replacing the cartridge fuse and returning the vehicle to service.
- Before servicing the vehicle refer to the precautions at the beginning of this section.
- Remove or disconnect the following:
- The negative battery cable
- The cover from the Power Distribution Center (PDC)
- The two screws securing the generator cartridge fuse to the two B(+) terminal stud bus bars within the PDC
- The generator cartridge fuse from the PDC
To Install:
- Install or connect the following:
- The generator cartridge fuse onto the two B(+) terminal stud bus bars within the PDC
- The two screws securing the generator cartridge fuse to the two B(+) terminal stud bus bars within the PDC
- Tighten the screws
- Torque to: 30 in. lbs. (3.4 Nm)
NOTE: Ensure that both screws are tightened to the proper torque values.
- The cover onto the PDC
- The negative battery cable
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