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  1. mattsk8

    Odd electrical runs from starter to alternator to junction block

    The other reason I wanted to do this was that I upgraded to a 100 amp alternator and never changed the charge wire, and the stock wire is too small. I've also upgraded the headlights, stereo, horn, added KC lights, etc, so I wanted make sure the alternator charge wire was good. I've actually...
  2. mattsk8

    Odd electrical runs from starter to alternator to junction block

    The main reason I'm doing this is... Someone long before me did something because there isn't a fusible link in the charge wire that went from the alternator stud to the junction block on my truck and there should be. Plus they used a butt connector at the junction block to connect the wire...
  3. mattsk8

    Odd electrical runs from starter to alternator to junction block

    And this is my original wiring, as well as what I'm proposing. Sorry, I'm not much of an artist lol.
  4. mattsk8

    Odd electrical runs from starter to alternator to junction block

    Here are the schematics I've found. Both of these show the charge wire going to the battery, and my truck did NOT have the charge wire going to the battery. Edit: I included a third schematic, which is for my year but a 6 cylinder, but it is the way mine is wired.
  5. mattsk8

    Odd electrical runs from starter to alternator to junction block

    I have researched it a lot, not only that but I've also traced all the wires in my harness. Finding a schematic specific to a 1986 is difficult, but I've looked over the earlier schematics (which are like mine), and I've looked over the later schematics which are like @dsteelejr explained. I...
  6. mattsk8

    Odd electrical runs from starter to alternator to junction block

    I've researched this a lot and still can't find sense to why GM wired this the way they did. On my 1986, it's wired this way... Battery to starter... Starter via fusible link, then split to 2 wires going to alternator spade 2, other wire to the bulkhead plug on the firewall... Starter via...
  7. mattsk8

    Wiring to battery or alternator?

    So far for grounds I have battery to engine, engine to frame, frame to core support, then at the back of the engine I have engine to cab. I think this is sufficient for the main grounds but I'm all ears if anyone thinks more are needed (IIRC there's also a ground strap on each fuel tank). I'll...
  8. mattsk8

    Wiring to battery or alternator?

    The wiring is kinda the final stage of this. Right now it has the stock wires on the alternator, but I ordered the American Autowire 8 gauge alternator wires to rewire that too. Was also contemplating ditching the junction on the firewall above the distributor and rerouting that too, just to get...
  9. mattsk8

    Wiring to battery or alternator?

    First post here. I have a 1986 K20 that I've built from the ground up. I have a hopefully simple question about hooking up my headlights, horns, off-road lights, and some constant 12v power inside the cab for stereo memory, a CB, Dakota Digital gauges, etc. I'm installing a relay box, it has 6...
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