87honda

I have a 87 accord Si model (Australian). i am replacing deck with a better one with before to power my 6by9 type R alpines. when taking the deck out i have stuffed up the wiring scheme. i also dont know the colour codes for honda.. if possible can someone tell me how to hook a deck up from scratch or using the old wires.... dont worry about the speakers got them worked out.. just need to power the thing.. i have a red, black, and yellow cable coming out of the deck.. where do they go..
My uderstanding is that
Red=Positive
Black=Ground
Yellow-Memory

Any help will be great.