how to wire aftermarket speakers using factory wiring

[Zeee]

solved- I messed up

2019 civic EX hatchback, basic sound system, bigger screen factory head unit- help I am stumped and probably measuring wrong. The original speaker had the 4 wires going into the same harness. When the radio is on all 3 pairs of wire receive an audio signal, even with the 4 lower wires separated.
I have a brick crossover and I’m trying to keep it clean and use the factory wiring from
The brick to the tweeters, but I don’t think I can do that if they are receiving an input signal from somewhere else, but I have no idea where it is coming from.

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[bluehatch17]

There are plug and play harnesses.

 

[Zyvin]

2019 civic EX hatchback, basic sound system, bigger screen factory head unit- help I am stumped and probably measuring wrong. The original speaker had the 4 wires going into the same harness. When the radio is on all 3 pairs of wire receive an audio signal, even with the 4 lower wires separated.
I have a brick crossover and I’m trying to keep it clean and use the factory wiring from
The brick to the tweeters, but I don’t think I can do that if they are receiving an input signal from somewhere else, but I have no idea where it is coming from.

This should be straight forward. Just remember when measuring an audio signal use AC not DC.

 

[spdmn75]

How about getting the schematic first

 

[Zeee]

How about getting the schematic first

I am struggling to find it the schematics I could find didn’t have the matching pink/gray wire pair for the driver door. Although now that I’m not sitting in the heat it occurred to me any schematic regardless of color could clue me in to how it’s arranged

 

[Chilly613]

Damn, if you buy speakers at Crutchfield, they throw in plug and play harnesses for free.

These came with the speakers I bought awhile back when I had my 10th Gen.

https://www.crutchfield.com/p_120727800/Metra-72-7800-Speaker-Wiring-Harness.html

I wish you luck on getting it all wired up.

 

[spdmn75]

See if this helps

 

[Zeee]

See if this helps

Sweet! Found the setup I have, but still confused. I severed the connection between the tweeter and speaker at the speaker connection (shown in the original post) but the tweeter is still receiving signal and according to the diagram that shouldn’t be possible. It’s as if there’s a separate T somewhere feeding it signal. The curious part of me wants to strip it all back and see what the heck is going on and the lazy part of me saying abandon it and run a separate wire

 

[Zavage]

Don't forget: if the tweeters are still getting any signal from the cables, there might be a source feeding them. And the source is probably only throwing the high frequency signals out which are missing in the Mid/Low speaker cables.

 

[Zyvin]

Sweet! Found the setup I have, but still confused. I severed the connection between the tweeter and speaker at the speaker connection (shown in the original post) but the tweeter is still receiving signal and according to the diagram that shouldn’t be possible. It’s as if there’s a separate T somewhere feeding it signal. The curious part of me wants to strip it all back and see what the heck is going on and the lazy part of me saying abandon it and run a separate wire

You had it in your first post. The two wires at the bottom that have continuity to the top are the tweeter wires.

When you say the tweeters wires at the top have “signal” with all the wires separated; how are you measuring that “signal”?

 

[Zeee]

You had it in your first post. The two wires at the bottom that have continuity to the top are the tweeter wires.

When you say the tweeters wires at the top have “signal” with all the wires separated; how are you measuring that “signal”?

Welp. I went and checked it again and this time everything worked as expected. The only thing I can think of is that I fat fingered the probe. On the plus side that pdf is going to come in handy in the future! Thanks for the help everyone!

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