![]() It runs from the key switch ignition terminal to the firewall block. The HEI feed wire can also be run from the firewall connector if you remove the orange/blue resistor wire and replace it with a 12 gauge red wire. In 1974 Gm started running the feed wire from the starter large post on the solenoid and the fusible links were moved down there. If you don't have this then you are getting your positive voltage to the cab from somewhere else. It feeds and protects the entire positive circuit for the truck. The fusible link is nothing but a section of smaller gauge wire inside the wire that goes from the battery positive post to the terminal on the passenger side fender. If you have an idiot light you won't have these wires. ![]() This fused wire is for the battery charge gauge and works in conjunction with the one on the bottom of the diagram. If you look at the top of the top diagram you can see the fusible link and the wire with the fuse inline. my question is this, i dont have a fuseable wire from the battery do I need this an where can i get one, also what size fuse goes into the inline fuse link ? I'm redoing several mistakes PO have done an dont know what to do here! I have a question regarding the black fuseable link wire coming from the positive side of the battery goes to a juction box, an the black wire that shows a fuse inline. are you talking about running a red wire from the fuse block in the engine compartment or from the fuse panel inside the truck? Also, when you say unfused, do you mean no inline fuse or something? I know, I really dont know much about the electrical, but I will give hell trying. That makes sense now.one question though, when you say "new 12ga to HEI from ignition unfused in fuse panel". New 12ga to HEI from ignition unfused in fuse panel (red)Įxisting 12ga to Starter from fuse panel(solid purple)Įxisting 6ga positive battery cable to Starter from battery (Thick Red or Black) Now, having all that said, the truck is 40 years old and has probably already been butchered a bit in the wiring department, so your wires may look different.as long as your finished product looks exactly like the diagram above you'll be set: the reason for doing this is the puple/orange wire is a resistance wire, and will get super hot and melt if left connected with no coil. With HEI, there is no coil, so the yellow and purple/orange wires are not needed any more.you can just cut it off at the fuse panel and toss it. that yellow wire goes to the coil for the old points distributor system. The purple/orange wire T's with a yellow wire before it hits the starter. a solid purple wire, and a purple/orange wire. Sure, in stock form, there are two wires from the fuse box that go to the starter.
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