Theres no power..at all!

I was taking the alarm out of it (i just bought it, it needs a lot of work) and the courtesy lights were on the whole time (when i was cutting the alarm/remote door lock wires)

Then when I put it back on the ramps there was no power in the cab at all even when I turned the key nothing happened.

Then I turned on the fan and wiggled the terminal cables at the battery, I wiggle the + cable and it came on for about 2 seconds then it went off and i tried it again and nothing happened, then I sanded the connectors so they were nice and clean and i got them all tight and nothing still

any ideas?

also theres some red/black or pink/black wires hanging around and In the fuse box, any idea what these are for? I spliced the yellow ignition wire back together as it had been involved in a relay with the alarm

Id appreciate any help!

also are there any wiring diagrams for the whole car?