Car stero wiring harness help

[wormhole]

Ok, I have 2000 Toyota 4runner and picked up a new Pioneer CD player (single DIN) from Crutchfield. So I go ahead and wire up the harness that came with the radio (the single harness for the back of the new stero and the two adaptor harness that were supplied with the install kit) ad yes I read the direction.

Went ahead and pulled the stero apart tonight and to my surpise I have one single harness plugged into the back of the OEM deck (cd and cassette deck). The harness is slightly larger than the largest of the supplied harness.

With a stumped look on face and some confusion I put it all back together and came to this point. Now I have a few questions -

1. Should there be two wiring harness hooked into the factory deck?

2. Why would the factory harness be larger than the supplied harness?

3. Where could I find a larger single harness adaptor?

4. I have to idea what I'm doing and should jus bang my head into a wall. (just kidding)

Hopefully, this makes since.

[wormhole]

Okay, hopefully this explains it a little better but it probable just shows how stupid I am but if you scroll down to step 1 (http://www.4runners.org/writeups/headunit/index.html) there's a diagram showing the wiring. I have M1 and M2 spliced into SH (the harness that came with the new radio).

Now the problem is that I have no T2 harness only T1 and the M1 harness is to small to connect to T1 (M2 is half the size of M1). The only other wires connected to the OEM deck is the power antenna and amp (single plug, audio jack type plug).

Should I even have M2 spliced in at all but that still doesn't solve the problem that T1 is larger than M1.

[MHSD]

You have a factory amplified system. If you look in the opening where the radio goes. you should be able to find another set of plugs in there that will match the plugs you have wired to the Pioneer harness. They will simply need to be unplugged from the harnesses they are plugged into and then you can plug in your head unit. this will bypass the factory head unit.

Hope this helps.

Bryan

[sienna1]

Originally Posted by MHSD

You have a factory amplified system. If you look in the opening where the radio goes. you should be able to find another set of plugs in there that will match the plugs you have wired to the Pioneer harness. They will simply need to be unplugged from the harnesses they are plugged into and then you can plug in your head unit. this will bypass the factory head unit.

Hope this helps.

Bryan

The factory amplifier should be mounted somewhere below the headunit. There should be a 6 and 10 pin plug at/from the amp (output of the amp) which should match your harness plugs.