Head unit help, wiring the head unit Options

[bdweber3]

if there is anyone out there that knows of a site that has the factory map of the wiring diagram for the head unit. or if anyone knows the wiring cominations of the head unit connector. i was popping in a new head unit the other day and was blocked by the connector pins not meshing. ive done this process before but with a paseo numerous times but now im on a celica. i am going from a toyota to a sony. if anyone could help it would be much help. thanks bryan

[SHRiNE]

Arnt the wires color coded?

[AMCMoe]

http://installdr.com/Harnesses/Toyota-Wiring.pdf

Get a wiring harness though, from like walmart or any place that sells audio equipment.

[bdweber3]

the wires are colored. but the connector is a competly different connector then the one i had going into the paseo. if i go to walmart and get a new harness will it work (colors working out)?

[SHRiNE]

the wires are colored. but the connector is a competly different connector then the one i had going into the paseo. if i go to walmart and get a new harness will it work (colors working out)?

Yeah, it will..just make sure to get the one for your car. I got mine from there and sometimes you might have to mess with the wires, like if it doesnt work when you put the same colors together(which they should) but mine didnt..I had to put my yellow and red wires together for some reason, but mines a pioneer. So you shouldnt have any problems.

[bdweber3]

well il head there tom to check that out. if that doesnt work the comute to college will blow big time. thanks for the help guys. u guys rock!

[Bitter]

sometimes driving in silence is good.

most harnesses include an instruction page which lists what headunit pigtail wire color goes to what wire color on the harness side. its just a matter of soldering and heat wrapping it all together. its pretty easy, and shouldnt take more than an hour. i do mine while i'm watching tv or talking to someone so it doesnt get too boring.

[bdweber3]

hey guys i ended up buying one of the "scosche" harness from walmart today and got it all hooked up and plugged the one end into my sony and when i went to plug the male end into the female end of the factory plug it didnt fit. the plugs are still the wrong size. the one that i used was the TA021, which when i double checked the internet information to the booklet in walmart it said it would fit.... but it doesnt.
Shrine do you remember by chance which walmart plug you used?

This post has been edited by bdweber3: Oct 8, 2006 - 8:43 PM

[kcizzle]

hey guys i ended up buying one of the "scosche" harness from walmart today and got it all hooked up and plugged the one end into my sony and when i went to plug the male end into the female end of the factory plug it didnt fit. the plugs are still the wrong size. the one that i used was the TA021, which when i double checked the internet information to the booklet in walmart it said it would fit.... but it doesnt.
Shrine do you remember by chance which walmart plug you used?

I just bought a pioneer head unit that that came with Scoche TA02B for Toyota 1987-up. I haven't installed it yet but I'm planning to install it myself.

[AMCMoe]

You more than likely need to bypass the factory amp, the wiring harness you are using is probably the wrong one. When I get home, I'll take and post some pictures for you and anyone else for future reference to show how I hooked it up correctly. Though I'm pretty sure this has been posted before.

[AMCMoe]

Shrine do you remember by chance which walmart plug you used?

The 87+ Toyota wiring harness is the one you need. One like this- http://www.crutchfield.com/S-ErgBDET0bOs/c...amp;i=120701761

[bdweber3]

well i was at class today and was on a break so i decided to work on my car til the next class. i ended up finding a way to get power to the sterio, i disconnected the amp thats under the head unit and using the two cables that connected to the new adaptor that i bought at walmart that has the plugs of this website http://www.crutchfield.com/S-ErgBDET0bOs/c...amp;i=120701761. its a temperary fix but it seems to work.

what confused me was that when the wires come out of the amp they make one plug that didnt fit any connector that i have seen at all. (kinda gay if you ask me) but the plugs going into the amp are the ones that were compatible so now i have a usless amp until i find a new cable system. any ideas anyone? if you have pix of how you did it (got the amp included and wired so it fits, please post b/c they will be of much use.

thanks, bryan

when i get home from class today il post a pic of what the single cable looks like (the wires that are comming out of the amp to the factorys head unit

This post has been edited by bdweber3: Oct 9, 2006 - 11:12 AM

[Sinyk]

If the connectors were under the stock amp and were blue then you are using the correct ones. The single plug you are talking about is proprietary to the deck and comes off of the stock amp. There is no wiring harness for this.

I was stumped for a bit at first when I took out my stock deck and saw one plug that didn't match my wiring harness, but then I read on these forums where the correct wires were and now there's no prob! (Except finding the time during the day to get the isntall done)

[bdweber3]

this may sound like a stupid question but when i took the plugs from the amp the tweeter/dome speekers dont work now. does the amp that i disconnected and redirected to the head unit power those speekers? do you have the tweeter/dome speekers in your car? are they working after you swapped the head units?

[Sinyk]

Well now, I haven't had the time to get my deck in, I've just done the research I had the deck ready to install and then I had a few questions regarding the amp, so I stopped.

Though you raise a good question and it was one I have as well. With the 6 speakers up front, and with bypassing the stock amp, I assume all of my speakers won't work, right?

I heard some people talk about an amplifier integration wiring harness and connecting the tweeters using RCA cables, but I wanted to know if this was the actual solution to getting all 6 speakers up front working properly, or something else?

What speakers work when you plug in the wiring harness out of the 8 speaker system? I assume the rear 2, but which ones of the 6 up front?

[bdweber3]

sinyk do you know of anything on the market that would work to get all 6 speekers working (the harness) or is it just a myth.

[azian_advanced]

this was posted a while back, luckily i did a search and found what you're looking for:

http://www.6gc.net/forums/index.php?showtopic=9930&hl=

i've done numerous searches before and some of the details were still quite vague..
but to sum it all up, if you want to keep using your stock amplifiers, you'll need an unamplified signal out of the aftermarket deck you're installing (usually as RCA plugs for output audio at the back of the deck) to mate with the amplifier integration harness. i've already bought mine, the link is in the link above. here's how it should look like.

Metra 70-8112 Premium Amplifier Integration Harness


i'm assuming the rca cables plug into the rca outputs on the back of the deck, these btw are unamplified audio signals. there are two sets, black & white and purple&green. one pair for the front audio signals, the other for the rear.
the rest of the wires hook up to the harness of the aftermarket deck for power, ground, antenna, etc.
a diagram can be download here:
Metra 70-8112 Installation Instructions

the male end of the Metra harness plugs into the original wire harness connector from the amp to the factory stereo.(below)



i hope that just about clarifies everything...
this is what i've found after undergoing some research, but if any of it stands incorrect, pls post.

This post has been edited by azian_advanced: Oct 11, 2006 - 11:18 AM

[Sinyk]

This weekend i'm going to play around with my stereo and such, so I'll let you know what I find as I have fun

azian_advanced: great pics there. I have a stanard Scoshe harness right now, and I doubt it will be exactly what i need, but i'm still going to play around with it.

This post has been edited by Sinyk: Oct 11, 2006 - 1:26 PM

[bdweber3]

azian_advanced: in the picture that you posted is there a name for the cable that you marked as "leads to speekers, do not unplug" thats the cable i am looking for. the cable that you sent me too looks different for some reason.
also does anyone out there know of anyone selling or can get a cable as marked in the picture above as "this connector" my friend came to me and is looking for one so im tryin to help a brother out.

thanks bryan

This post has been edited by bdweber3: Oct 11, 2006 - 11:04 PM

[azian_advanced]

azian_advanced: in the picture that you posted is there a name for the cable that you marked as "leads to speekers, do not unplug" thats the cable i am looking for. the cable that you sent me too looks different for some reason.
also does anyone out there know of anyone selling or can get a cable as marked in the picture above as "this connector" my friend came to me and is looking for one so im tryin to help a brother out.

thanks bryan

the cable marked as "this connector" in the pic above is proprietary to the factory stereo as mentioned. for this cable, your best bet is probably to ask the dealer for it. unfortunately, the parts catalog i have is all jdm and my U.S. parts book doesn't even include this.. you may want to check your local wrecking yards as it seems this harness is used on multiple premium audio setups from 92-97 Toyotas like in 4Runners, Camry, and some Lexus models (GS300, etc).

the cable that's marked "leads to speakers" i'm assuming should have been there in the first place if you were using the stock amp. without it, i'm not even sure how your system even worked. but maybe you can ask a few members parting out their cars for that cable or perhaps start a WTB thread for this wire.

also if the jdm radio wire is the same as yours, here are the part numbers:

this is if your factory radio has the two outlets... not sure if this may be of any help though.

[nightrider]

best to use the power cables and harness, but forget the speakers. run the RCA's to your amp and connect the speakers dirct to the amp with good quality speaker wire. It will sound 100 X better than the current setup.

[bdweber3]

im kinda lost on the way you worded that entry could you elboate on it. does ur car have the tweeters? do they work? and does that amp power the tweeters?

[nightrider]

Yes, Tweeters are connected to the door speakers but I use a small passive Xover. This is connected direct to the amp. Amp to h/unit via rca. crisp clear sound and no need to mess with the looms!!!

[Sinyk]

So I finally got around to playing with my deck and I ran into some problems.

I picked up an amplifier integration harness, like many people have talked about in this thread, and I plugged it into the wire coming to the stock deck, wired it up to my Eclipse deck and..... nothing. No power.

So I then went and hooked up the stock deck back to the connector, and more nothing.

I ran a straight wire off of the battery to the stereo and I was able to get my Eclipse head unit to power up, but not using the harness.

After going through every fuse and testing the voltages coming into and out of the various connectors, I have concluded that I am losing power going through the amp. I think hooking up my deck with that harness somehow fried the stock amp and now I have no choice but to bypass the amp and use the blue connectors underneath.

I'm rather pissed off that this happened because the amp integration harness is such a quick install compared to this crap...

And odds are not all 6 front speakers will work anymore so I have to either rewire them in series, or go and get another amp, which is not what I had in mind.


Does anyone know if the stock amp handles crossovers to the tweeter and such or is there a voltage blocker inline for the tweeter? I'd hate to hook up everything and blow it.

[azian_advanced]

whoa... this got me all worried now.. i will be installing my deck next week with the metra amplifer integration harness..
i don't really understand how the amp would've blown or burned since the power is coming from there. perhaps the wires of the harness must've touched and shorted itself after it was plugged in.
just out of curiosity, did you plug the integration harness in first, then wire the wires to the deck? or did you do it the other way around?

[Sinyk]

With the Eclipse head unit harness unplugged from the head unit, i wired up the amp integration harness to the eclipse harness. Once complete i plugged the amp integration harness into the wire that connects tot he factory amp. Then I plugged it into my eclipse deck.


Considering it's late, and I was rather annoyed about the whole thing, I'm going to start on it tomorrow morning and see what I can come up with. Odds are I will bypass the amp to see what works considering right now it appears that my amp is done for.

So, until tomorrow, I won't really know.

[Sinyk]

Well it's all done.

I ended up bypassing the amp and removing it completely. It turns out that in a car with the premium stereo, there are 3 wire harnesses, not just 2.

There were the 2 blue harnesses (one for the head unit and front speakers, and one for the rear speakers) as well as another white 4-pin harness with a "P" marked on it (I assumed for Premium).

After connecting the wire harness I bought to the two blue plugs, I had the head unit, rear speakers, front tweeter and front 4" speakers all working (The 4-pin plug is for the 8's up front from what I found)

I ended up using the pins from the integration harness I bought to connect the 8's from the white harness with the front speaker wires connected to the blue harness. I connected the 8's in series so as not to blow anything and the system sounds great!

The extra power from the Eclipse deck made a noticeable difference throughout the system.

I think the hardest part of the whole install was removing the amp and the bracket.

[Bbuck35]

NOT bad .. i just put a 7" pop out LCD but for some reason the screen was catching on the dash panel, so i just switch my extra change hold to the top , so that is stuck close for now , untill i figure it out..

[azian_advanced]

Well it's all done.

I ended up bypassing the amp and removing it completely. It turns out that in a car with the premium stereo, there are 3 wire harnesses, not just 2.

There were the 2 blue harnesses (one for the head unit and front speakers, and one for the rear speakers) as well as another white 4-pin harness with a "P" marked on it (I assumed for Premium).

After connecting the wire harness I bought to the two blue plugs, I had the head unit, rear speakers, front tweeter and front 4" speakers all working (The 4-pin plug is for the 8's up front from what I found)

I ended up using the pins from the integration harness I bought to connect the 8's from the white harness with the front speaker wires connected to the blue harness. I connected the 8's in series so as not to blow anything and the system sounds great!

The extra power from the Eclipse deck made a noticeable difference throughout the system.

I think the hardest part of the whole install was removing the amp and the bracket.

could you please post pics of the amp and extra harness? i want to know if there's any way i can use my metra harness and use the stock amplifiers with the 8 speakers..