Okay, so I've replaced the wire. I was trying to get the wire out of my 1980 KE55 but since every Toyota gearbox has different wiring I couldn't. So I had to get this one from my KE36.
I had to cut off and modify the ends. I also wrapped it up in electrical tape in hope that the wires don't get damaged by anything around it.
I couldn't fit this to the car yesterday as it was getting too dark to see, so I did it today. (Burnt my hand against the hot engine.) I did remove the wire all together and replaced the fuse for work today and it didn't blow.
So now I've replaced it and briefly tested it. It looks good but only time will tell.
thanks for everyones help.
J.