![]() 08/14/2020 at 16:58 • Filed to: None | ![]() | ![]() |
Good:
The Echo is up and running, new (junkyard) alternator, and new plugs and fresh oil has it sounding like a new car. Might do a coolant flush and maybe transmission flush, but for now it’s fine to drive.
Bad:
Whoever wired the stereo is an idiot. Previously, there was some aftermarket head unit that the previous owner took out. I had this wise idea to “oh, I’ll just put in another aftermarket stereo” only now I see the harness in the Echo is different than the Toyota standard one and doesn’t match the ones I have for the new radio!!
I have no clue what these wires do.
![]() 08/14/2020 at 17:18 |
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The ones which are a color paired with a color/stripe (such as blue and
blue/
white) are the speakers. Odds are the heavy ones are the main power and ground.
![]() 08/14/2020 at 17:22 |
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Those wires are usually standardized, or close to it (they sure look like it).
Go to crutchfield and find wiring instructions for this model, maybe?
![]() 08/14/2020 at 17:33 |
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That looks like the harness that came with the prior aftermarket head unit. If the previous guy had done it right it would be soldered to an adapter that would plug in to the factory harness but they decided to just butt splice everything. I agree with frinesi2, if you go to Crutchfield you should be able to find an install kit for your specific model of car which should have the wiring diagram.
![]() 08/14/2020 at 17:34 |
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Check out https://techinfo.toyota.com/ . You can pay $20 for a two-day pass to be able to download the tech docs you need. Somewhere along the line I was able to get an html/pdf of their factory service manual. Sadly what I have does NOT have wiring diagrams, but it’s been pretty useful to me during my Echo ownership.
![]() 08/14/2020 at 17:50 |
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This.
![]() 08/14/2020 at 18:01 |
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I found the manual online, not behind a paywall. Fair warning, my work computer won’t let me to this site and says it’s a compromised site, so enter at your own risk.
https://caphector.com/atoyota/TableOfContents/manual.html
![]() 08/14/2020 at 18:24 |
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looks like the previous installer “ saved ” themselves $8 by skipping the adapte r harness.
metra harnesses usually have an OEM color code with them, so if you can just find a picture of the packaging you should be able to reintegrate the new stereo harness with whats left of the car wires
![]() 08/14/2020 at 20:20 |
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it’s the wiring harness for the turbine engine
![]() 08/14/2020 at 20:31 |
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Red accessory voltage
Yellow constant voltage voltage
Black ground
Blue remote (for amp)
Orange illumination dimmer
Paired wires are speakers, gray right front, white left front, violet right rear, green left rear.
That’s standard color code for aftermarket speakers.
![]() 08/14/2020 at 20:56 |
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These are standardized colors for aftermarket head units. I n this case it looks like there was an Alpine installed . Either way it does not matter as these colors have been standardized across the aftermar ket car audio industry for a couple decades now, so every major manufacturer will use these same colors. The color code is as follows:
Yellow: 12v+ constant (should always show voltage)
Red: 12v+ ignition (should show voltage when the key is in the ignition position)
Black: Ground
Orange: Illumination (it should be fed 12v+ from the interior lighting circuit of the car). When you turn on your headlights it will tell the radio to dim the display.
Blue: power antenna
Blue w/ white: Remote trigger (12v+ out to tell an amplifier to turn on). Some cheaper radios don’t have this. You would use the blue power antenna to trigger the amp.
The others are speakers, the solid color being positive and the same color with a black stripe being negative. They are as follows:
White: Left front
Grey: Right front
Green: Left rear
Purple: Right rear
Hopefully it was installed correctly so that you will know what the vehicle’s wire colors indicate. That is not standardized across the industry.
![]() 08/14/2020 at 22:45 |
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For the Toyota/Lexuses (Lexii?) I’ve worked on, Autozone’s website (or Advance Auto’s?) actually had FSM pages with full pinouts and wiring diagrams. As in, for the entire car.
![]() 08/14/2020 at 22:48 |
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Eh, there’s worse out there. I hope you can find a toyota pigtail if you go to replace the stereo, because the alternative of buying connectors and crimp ends and soldering and pinning the whole harness fucking sucks.
![]() 08/15/2020 at 00:46 |
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It can be spotty on the Echo, unfortunately .
![]() 08/15/2020 at 13:05 |
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Blue is power antenna, blue with white is amp remote turn on trigger.
Speaker pairs white (left front)
, grey (right front)
, green (left rear)
, and purple (right rear). The solid color is positive, the same color with a black trace is negative.
![]() 08/15/2020 at 13:06 |
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There is nothing wrong with butt splicing if it is done correctly. This; however, does not look like it was.