Starter issue
I have an 87 Chevy Astro 4.3 v6 and I can't get it to crank. Replaced a bad starter about 3 months ago and then over a 2-day period, there would be times it wouldnt do anything when I turned the key. I was sure it was just bad connections. I would loosen, twist and re-tighten battery connectors and It would usually start right away. Well, it got worse and then finally just wouldnt do anything. What Ive done so far is 1) checked all connections so they are tight. 2) checked all the fuses (the first time I checked, the ignition fuse was blown.) I replaced it, but that did nothing. The battery is very good, connections tight and I have good ground. I should add that the solenoid only engqged a few times before it stopped. I figured a short, but I couldnt find anything. So, I took the starter out and had it tested. Worked fine. I just put it back in and made sure all connections were good and now I can hear the solenoid popping but the starter wont engage. My question(s): Is the wire that connects to the same post as the battery have to do with cranking the engine? I ask because I really dont know where it goes to. I do know i have juice to the starter. Is there a relay Im missing? Would a bad ignition act like this. I am completely dumbfounded over this. I am going to run through the fuses again to make sure I didnt blow another, but after that, I have no clue as to what it could be.