Anyone with installing knowledge plz post HELP here

[RandomGuy]

Ok I am wiring my starion's sound... here are the problems so far:
The head unit turns on etc... but when car shuts off, its resetted... (both ACC and constant are both hooked up to the only +12v line in the harness) that was the only way i got it to work..
(i wont have to drill firewall to make another lead would i?)

Stock harness = 9 wires
Pioneer cd harness = ?12-13 wires, dont remember
remote system control not used... ground wire is hooked to metal panel inside of dash... hrm what else..

I hooked in all of the positives the the speakers.. and they all worked... as soon as I touch a single into the negative, they stop... wtf?. There is one negative that works reguardless of what I plug into it.. when i plug the negative wire from any speaker into that wire in the stock harness, all of the speakers suddenly get loud(er) and work better... the cd player is on almost max volume and its still barely loud.. (its loud, but nowhere, where it should be... its 50x4 head)

i need a diagram... I found one for an 84 starion, and its off...

I have a wiring harness for a starion... it has 13 pins on it. (the 2 pins on each side are unused, due to the size of the harness... its really wierd. I have no lead for constant power either.

Any pointers would be of great help.