1982 K5 Blazer stereo wiring

i had recieve a k 5 blazer with a working after market alpine am/fm cassete deck in it when i took the instrument panel of which it covers the front area of the dash where the radio sits wierd i know but it looks like i have to cut out the sheet metal to put a standard din sized deck in but the wiring is in shambles i had to figure out wire for wire testing where each gos so i figured it out after 10 minutes of testing  all were good but for some reason i can only get the alpine deck to work the wiring to the speakers is no problem its the power12v+                 - ground and the memory  now i dont know it somehow its regulated im no genius but its there a way i can just rewire thoses so i can make my cd deck work in there now my deck might be bad but i doubt it ive heard you need to have 12+ 12- and memory connected on some deckss for it to work if so its there a way i can rewire it so i can install a fter market deck in or a way to test the wiring to see if there is a short thanks  please if anyone could help it would greatly appreciated ~*Nate*~

HUH?????

12 Volts Constant = ORANGE usually at cig lighter

12 volts ignition = YELLOWParking Lites = GRAYLeft Front Spkr + = BEIGELeft Front Spkr - = GRAYRight Front Spkr + = DK / GREENRight Front Spkr - = LT / GREENLeft Rear Spkr + = BROWNLeft Rear Spkr - = YELLOWRight Rear Spkr + = DK / BLUERight Rear Spkr - = LT / BLUEBe sure and test YELLOW, GRAY & BROWN wires for Ignition & Lites prior to hooking up radio

MO

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