1997 toyota 4 runner, stereo system

here is info for your wiring. Battery     BLUE / YELLOW     (+)          RADIO HARNESS      Accessory     GRAY     (+)          RADIO HARNESS      Ground          BROWN     (-)          RADIO HARNESS      Illumination     GREEN     (+)          RADIO HARNESS      Power Antenna     BLACK/ RED     (+)     RADIO HARNESS      LF Speaker (+)          PINK      LF Speaker (-)          VIOLET      RF Speaker (+)          LIGHT GREEN      RF Speaker (-)          BLUE      LR Speaker (+)          BLACK      LR Speaker (-)          YELLOW      RR Speaker (+)          RED      I have not worked on one of these in a while and don't remember if there was anything to mess with. RR Speaker (-)          WHITE      Amp Location          RIGHT OF GLOVEBOX      Radio Security          YESThe wire I'm test'n isn't doin' what it's supposed to be doin'... I am so glad I printed that tech sheet, with the wrong info.

Do it right the first time... or I might have to fix it for ya

If i replace the head unit am i going to have to do something about the factory amp? And is the radio security going to be a problem? Thanks

If you are replacing the rear speakers, you can use the factory amp or bypass it. If you are replacing the factory radio, then the security is a non issue. If you disconnect power to the factory radio, then yes, expect the unit to lock up and a trip to the dealer to unlock it.Top Secret, I can tell you but then my wife will kill me.

I have taken the factory radio out already and have run into a problem. The wiring harness does not fit the vehicle.   It is the metra 70-1761. The metra manual says this is the right one but no luck here. What is the next step? Also, will i have to bypass the amp at all? (The front and rear speakers are staying factory.) I am only putting in a new reciever, a sub amp and subwoofers.

The harness that you have plugs into the harness that is plugged into the factory amp (bypassing the amp). If you want to use the factory amp you have the wrong harness.

No i do not want to use the factory amp. It looks to me that the amp is actually right behind the factory radio where the harness comes directly from. This is the harness that does not fit the one from metra. I do not see another harness or group of wires available behind the deck. Any suggestions?

Okay i removed the factory amp and found the harness! Thanks guys!

Everything is hooked up however the driver side front and back seat speakers are not working correctly. Somtimes they will turn on and sound great and other times it will not be on. Also, there is a constant hissing noise from all speakers, what is the deal here? It is a pioneer head unit, but it has never had a hissing problem in the 4 years of operation in a different vehicle. The hissing didn't start occurring until i hooked up the sub amp.

I'm thinking the cd player might be going bad but are their any trouble shooting techniques i can use??? Apprently the speakers will start playing when the car drives over a big bump or when the volume is turned down at lower volume but then it shuts off soon after. So very confused.