LX450 Stereo wiring

[KaisoCruiser81]

Can't help you much with the "right" way of testing the wiring harness or HU. My only suggestions would be to swap them with known working speakers to make sure it's not the speakers, then try to go direct from HU to speakers off the channel's wire to rule out HU issues.

 

[ChaunceyBronson]

Yes you can run new wire straight from amp to speakers.

Mine is ran with RCA preouts from headunit to amp under the passenger seat, then I ran new speaker wires from amp to speakers in the door through the door wiring bundles. Only parts of the original wiring I used were the power/ground/ign(?) from the stock harness to the radio.

Thank You so much, I can carry that forward if I know it’s possible and that’s how it works for sure. This is a great thread and community.

 

[ChaunceyBronson]

Can't help you much with the "right" way of testing the wiring harness or HU. My only suggestions would be to swap them with known working speakers to make sure it's not the speakers, then try to go direct from HU to speakers off the channel's wire to rule out HU issues.

Did you also wire in the dash and or the rear headliner speakers in this manner? Or did you retain only the 4 door speakers? Sub will be on a different amp and after this.

 

[KaisoCruiser81]

Did you also wire in the dash and or the rear headliner speakers in this manner? Or did you retain only the 4 door speakers? Sub will be on a different amp and after this.

Nope, pulled the dash/knee speakers and left the cargo area speakers in as I didn't feel like pulling them.

Dash speakers are tiny and don't really do much, but also super easy to access and remove. Seemed like more work to replace with 4 inch(?) speakers and figure out the wiring than was worth for negligible gain. The built in amp is also easily accessible to yank out. You might be able to fit an aftermarket mini amp back there if you tried.

Cargo area sub/amp is also easily removable.

 

[LX450Riley]

I know there has been a lot posted about this but after spending a lot of time reading through a bunch of info I was somewhat lost in misinformation and discrepencies. I accidentally came across a really easy way to wire an LX450 aftermarket deck so I thought I would share the info for anyone else searching for info.

My method requires no cutting and splicing of the already short AF factory wiring. This is a plug and play method with minimal running of wires to bypass the factory amp.

You will need one Scosche TA012 and TWO Metra 70-8112 wiring kits or suitable replacements. You will also need approx 8' of speaker (2 conductor) cable and a pile of red butt splices

After removing the factory amp from behind the passenger side lower dash speaker, you will have 3 plugs that were plugged into the amp. 2 of the plugs from the TA012 are used and one of the Metra plugs is used. Match up the wiring color for color and extend the left over speaker wiring to your deck harness speaker wires. On the deck end, just match color for color. The RCA plugs on the Metra kits aren't used (I chose to cut them off, taping them off is unnecessary as they are only connected to dead end wiring in the vehicle harness)

I put this all together by accident and it worked! The power antenna works with the deck and the deck lighting dims with the headlight switch as it should.

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Sorry I used your picture with so low quality I’m now trying to tackle this radio install and I’m checking to see if I labeled your photo correctly with the wiring harness you have laid out. This is pretty confusing for me sorry in advance.

 

[LX450Riley]

I had success! Made this up to help explain to people. IF YOU HAVE the extra unused plugs behind the factory stereo (many LC do) then you can JUST use the Scosche TA02B adapter. If they aren't there, to bypass the amp you need more.

View attachment 1648500

I have a question on my photo attached. The location of these two harness’s are going to the glove box to bypass the amp. On ta02b side there’s an orange wire and on the metra side there is no orange wire. Do I leave the orange wire alone.

 

[clx16]

I don't recall but I thought the orange took the blue from my head unit which I think corresponded to my antenna power or amp power. Been a long time

 

[LX450Riley]

I don't recall but I thought the orange took the blue from my head unit which I think corresponded to my antenna power or amp power. Been a long time

Yeah I was trying wrap my head around to some of the pictures people had posted. It looked like sold blue went to sold blue and orange went to blue and white. But there’s no way to tell with the wires all wrapped in black.

 

[clx16]

Is this graphic correct for that connector?

 

[LX450Riley]

Is this graphic correct for that connector?
View attachment 3934194

Yes that correct.

 

[RiverBiscuit]

I just did this recently. Orange is for the dimmer. If I remember correctly I used the Orange and Orange/White (connected them together) and capped off the Orange/Black with electrical tape as it was unused.

Blue and Blue/White both go into the same connector (connecting to solid blue).

 

[LX450Riley]

I just did this recently. Orange is for the dimmer. If I remember correctly I used the Orange and Orange/White (connected them together) and capped off the Orange/Black with electrical tape as it was unused.

Blue and Blue/White both go into the same connector (connecting to solid blue).

sorry for the late reply but I've got everything wired up and it all works.

 

[Adam L]

Ran out of time today but I’m on this path right now. Crazy amount of effort just to have Bluetooth or CarPlay. Got everything up and running but ran out of time to read more and diagnose antenna/illumination. I know it’s purple or something need a break.

 

[Adam L]

Ran out of time today but I’m on this path right now. Crazy amount of effort just to have Bluetooth or CarPlay. Got everything up and running but ran out of time to read more and diagnose antenna/illumination. I know it’s purple or something need a break.