Voltage Drop

[brandnu6]

Hello everyone. Hope all is well. I'm having a problem with my battery losing voltage when I turn the key to the "run" position. As a result, car will not start. I did a "parasitic drain" check. It's within specs, 38 Mili amps. [.038] I did some checking with "fusible links." Also, I relocated all "five" of them up on to plastic inner fender years ago, I really didn't think the "starter solenoid" was an ideal location. I brought a feed from the battery to supply power. Anyway, there is not a whole lot of information with regard to fuse links. I found some in the GM books I have, but not a "complete" break down of exactly what each of the links supply power to. I was able to isolate "Fuse Link "A." That's the one that supplies power to the "charging circuit." Here is where I am at. With my multimeter on the battery terminals, I have a normal reading 12.6-12.7 volts. As soon as I apply power to this particular link, I hear a click, most likely a relay, then the voltage begins to drop. It drops to low 11's, 11.1-11.2V. The car WILL NOT START! What I need to know, is what "fuse link "A" feeds, "everything." Then I can isolate whatever is causing voltage drop. I also replaced key switch last year. This problem is "new." Thanks very much. P.S. this winter when I put the car away, I plan on replacing the three switches at the bottom of the "steering column." I found a "neutral safety switch," "ignition switch," and a "turn signal switch. All [NOS] in the box. I did speak with someone with this issue, and he said, [C-100,] "bulkhead Connector." I do not want to go there unless I have no other choice. I hope you have enough information to solve this issue. Thanks again in advance.