2G Starter/no crank issue

[Rengar18]

So for a few days my starter stopped working on two occasions. Both times I just jiggled/tighten the positive wire nut going on it and it started right up.

Happened again, jiggled/tightened it and still wont start so i went ahead and replaced the starter and same deal.

Voltage on battery is good reading around 12~ while trying to turn it. I've read it can be the starter relay gone bad? How would I go about testing it (its behind the radio next to the fuel pump relay right?) Heres some pictures of 3 the grounds I have on the car (except chassis to IM) and the positive wire going to the starter. The + wire looks a little beat up, could it be that? I can go ahead and cut that off and clamp on a bronze post like the ground I have there.

Thanks.

Also note i'm using a bolt from the main bearing cap for a starter bolt (with the ground on it)if that matters at all.

 

[miguelmcv]

You need to change those Terminals.

Also Try to jump a wire from the battery to the starter to see if that works.

If that works, then your relay is bad..

If it doesn't work, then your terminals are no good.

 

[newalonguy]

def try to jump the battery to starter to point to relay ALSO if you are measuring voltage when cranking if you aren't seeing a significant drop at the battery that can point to the relay as well (not allowing voltage to send starter

 

[Rengar18]

Alright it cranked running a wire from the tab on the starter to the pos post on battery. I'm trying to bypass the relay with this method here, post #13 http://www.dsmtuners.com/forums/newbie-forum/296399-what-can-cause-starter-relay-blow.html

Where do I run the two black wires he has coming from the relay to? To the pos post on the battery? No idea what to do next...