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Discussion Starter · #1 ·
I'm in the process of restoring a 72 BB chevelle and have just replaced all the wiring (old wire was all cut up) in the engine compartment. After replacing all the engine compartment wiring I don't have any power to the fuse box. What wire sends 12 Volts to the fuse box? Let me get this right, The battery and the wire that goes to the altenator go to the "big" terminal on the starter. The Yellow wire goes to the "R" side and the purple goes the the "S" side. I have 12 volts to the Altenator and thats it. Do the wires that go to the external regulator from the altenator suppose to have 12V???? I HATE WIRING..... I'd just soon have a good hard kick in the ol' boys... LOL any help is truly appreciated.. Thanks
 

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"The battery and the wire that goes to the alternator go to the "big" terminal on the starter

The wire from the starter to the alternator has a soldered junction inside the harness, from that junction a wire connects to the horn relay. There is a black, fusible link, wire that is connected to the same terminal on the horn relay and to the bulkhead connector. This it the power source to the fuse block.
 

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Discussion Starter · #3 ·
Thank you. I know the exact wire you are refering to. I can't believe you have to have a horn relay to make the car work... I guess you could always by-pass it.... Thanks again for all you help..
 

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The large stud, on the horn relay acts as a junction block. You don't really need a horn relay but you need some place to tie the wires together. Late 70s trucks used a junction block on the firewall.
 
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