I have a 75.k10 that I installed a 350 in amd none of the bulkhead wire.colors.matxh and online diagrams. I have no power anywhere ,no lights or juice at the fuse box. Ive connected and reconnected wires to the junction block and starter with nothing happening, can someone.please try to tell.me what wires.go where from my.pic
Thanks
First off make sure you hooked up the grounds and they are secure... Batt to alt bracket or block, block to frame, back of head to cab Etc.
Batt positive is hooked to starter lug with the additional red wires, the purple wire should be on the "S" terminal of the starter solenoid
The two heavier gauge red wires on the bulkhead provide all power to the separate circuits in the truck, It is not uncommon for the spade terminals inside the bulkhead for these two terminals to burn up. It should be evident if you disconnect the bulkhead and look for the pins that correspond to the wire locations, the pins may be damaged or missing entirely or may have melted the plastic away from the terminals. If the pins are there check each of them for voltage.
If no voltage Those wires have a few fusible links in them at the junction block on the firewall (left of brake master cylinder) and at the batt lug of the starter, one of those wires may also be on a 'Y' with one leg to the batt lug on the alternator.
The red and purple wires often get discolored due to heat and time, they may be any variation of red-pink-purple or even yellow but if you trace them back into the harness a short distance the color gets better (usually).
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