Rb20Det Starter/electrical Problems

[slipn]

Hello!

My R32 seems to of caught some electrical gremlins..

A month ago the starter started to make really bad grinding noises and would not start so I bought a second hand starter and bolted it on.
Car was fine for awhile but every now and again I try and start it and it will just do a "click" when I turn the key, like it has a flat battery.
I turn everything off and take the key out then try again and it will kick over fine.

But today it got worse. I started the car and drove it about 4 meters into my garage and installed new indicators. I turned the cars power on a few times to check that the indicators were working.
When I tried to start it again I got a bad grinding noise... ok.. tried again and it just did the same "grieeeggghhh" every key turn

I tried it so many times I thought I killed the battery so I jumped started it with leads and then BANG it kicked over easy???
I drove it around and it started every key turn except once where it did the "click" "click" again.

I am so lost to what it may be?? Is it my battery? Is it a bad earth??
Kinda scared to drive it anywhere far away from home at the moment

[niZmO_Man]

Check wiring at the start and battery. Clean the links (fat-ish wires with plugs attaching to positive terminal) while you're at it.

Grinding noise is worn teeth on the starter and/or flywheel (when people run the starter after the engine fired up, all too common and cringe worthy).

[slipn]

Would it be worthwhile to replace all the wiring from the starter to the battery?

Also I have been told to replace the starter.. again.
Could it be a problem with the starter?

[89CAL]

Have you checked voltage, both resting and during cranking?

Check the earths for loose bolts, corrosion and general bad connections. Also breaks in the wires (both positive and negative)