Recently I bought a CD/DVD/GPS Radio for my car. I thought it would be a simple task, go grab an install kit, and a harness.... nope. I searched everywhere for solutions and read thread after thread trying to figure out what to do!
After 2 days of research and analysis I have came to what I think is a proper way of installing an aftermarket radio into a 1996 Ls 400. I have a lot of information here so lets start....
First off my original specs:
Original Lexus Deck (Tape Player) Made by Pioneer Electronics.
Lexus Amplifier (Located under passenger seat)
7 speakers total
-All four doors
-2 tweeters in Front doors
The way the speakers run in the 96 are similar to the other generations. The tweeter comes off of the front door speakers. The speakers in the door are Pioneer 2 Ohm speakers, which should sound fine in any aftermarket deck.
In order to remove your old deck:
GOOD GOOD... now you got the stereo out, congrats with the easy part!
- Start by prying on the backside of the shifting panel to loosen the two back clips (near the cup holder, spring it secure).
- Lift on the rear of the panel to release the two mid clips near the mid of the panel.
- Place the car in Low gear(1) and apply E-Brake.
- Pull the panel with ashtray towards you (back) in order to free the top clips.
- Disconnect the clips and remove (Hey clean while your in there! )
- Remove the vents/clock/temp gauge by inserting a thin pry tool at the
- lower edge and pulling out one side then the other.
- Disconnect connectors and remove vent and controls.
- Remove two exposed screws from top of AC control bracket.
- Remove two exposed screws from below car stereo. (not the small ones the ones the same mm size)
- Pull car stereo and AC control forward.
- Disconnect all connectors from AC control and car stereo along with antenna.
Now install your deck into its install kit. I used one from Metra model #99-8153. This is a single din install kit. You will actually install your A/C unit into this kit. It works well and replaces the entire factory bracket and fits snug into place for a secure holding.
Power the new deck:
In order to get power into your new deck you will want to splice into the factory plug near the deck. I supplied from plug R 3C upfront. If you observe the plugs you will see one of the gray plugs that has 14 pin slots but only 10 to 12 wires used ( plugs normally are labeled with factory imprint). This plug has a Lavender wire with a Yellow stripe. It is pin No. 1 and this can be your hot wire. You may use Pin No. 14 which is Brown for your ground(Ground 2) from the same plug.
More Information about this Procedure:
Unfortunately you can not use your SUB anymore after this. I have read ways to, but I feel they are a waste because this procedure by-passes the amp so it is pre-amp, honestly how many watts is your deck.
Your going to use wiring diagrams in order to run wires directly from your deck to the speaker wiring junction where the amp is located and connect hardwire them before they enter the amp. This is easier then running all new wires I feel, and takes advantage of the already installed factory wire.
The wiring diagram is listed at the bottom of this post. It is called If1rap96.pdf (You need a pdf reader to view it. Adobe is free but bloatware I suggest Foxit PDF reader its fast, free, and has less ware on your processor.
In order to access your amp....
If its under the seat go to passenger rear door and look down, you will see a plastic molding at the edge of the seat (Move the seat all the way forward up right) The molding has two squares on it, remove these with a pry tool and remove the two Phillips screws. Now the amp wiring is exposed.
1996 Lexus LS400 Amplifire Wiring Information
What you see here is 4 plugs pictured below
These are the four plugs pictured from left to right when you expose the amp plugs.
Connector Plugs Descriptions:
S10 B: White
S11 C: Gray
S12 D: Green
S13 A: Orange
Connector Pin Assignments:
Warning: These pins are my interpretation of the diagram. Please view and double check all information.
1- Brown/Black - Ground
3- White - Front Right +
4- Red - Rear Left +
5- Yellow Rear Right -
6- Pink/Blue Amp +
7- Black - Beep
8- Red- Front Right -
9- White front Left -
10- Black Front Left +
11- Shielded - Signal Ground 1 (goes to CD/Radio Player)
12- Brown/Red Signal Ground 2 (goes to CD/Radio Player)
13- Green Rear Left -
14- Green Rear Right
1- Light Green/Black Woofer + (WOOFER POSITIVE)
2- Light Green / Red Woofer (WOOFER NEGATIVE)
4- Brown/Yellow Signal Ground 4 (to Disc changer)
5- Brown/White Ground2 (to disc changer)
11- Light Green CAP+ (to disc changer)
12- Violet CAP (to disc changer)
1- Light Green Front Right + (RIGHT FRONT SPEAKER)
2- Pink Front Left + (LEFT FRONT SPEAKER)
4- Red Rear Right + (Rear Door)(RIGHT REAR DOOR SPEAKER)
5- Black RL+ to Telephone (Rear Door)(LEFT REAR DOOR SPEAKER)
6- Light Blue? Front Right (RIGHT FRONT SPEAKER)
7- Violet Front Left (LEFT FRONT SPEAKER)
12- White Rear Right (Rear Door)(RIGHT REAR DOOR)
13- Yellow Right Left Negative (Rear Door) (LEFT REAR DOOR)
1- Brown Ground 4 (to CD Player)
2- Lavender/Yellow +B1 (to CD changer) Radio No. 1 fuse 20A
3- Shielded Signal Ground 3 (to CD Player)
4- Brown Ground 5 (to CD Player)
5- Lavender/Yellow B2 (to CD player)
6- Gray ACC1 Radio No. 2 fuse (7.5A)
7- Light Blue Mute (to CD Player)
8- White HAP - (to CD Player)
9- Black HAP + (to CD Player)
In order to run the deck preamp your going to splice into sets of wires on this amp. warning this is a long task be prepared. I bought some small suitable gauge wire from the store and went to work measuring the length I need and a little more for room to work with. The main wires you want to focus on are listed in order below.
The main plug you work with is the GREEN plug S12-D.
(You will notice positive and negative are vertically flush)
Positive: Pink/Pin 2
Negative: Violet/Pin 7
Positive: Light Green/Pin 1
Negative: Light Blue/Pin 6
Positive: Black/Pin 5
Negative: Yellow/Pin 13
Positive: Red/Pin 4
Negative: White/Pin 12
These are your speakers you will need to hardwire directly to your new unit. Remember to work around your seat position rail when installing the wires. I did not go beneath carpet for my install but, I had minimal wire appearance. I went directly from my amp location, underneath my seat rail, to the mid-console, to the din.
Note: The door speakers in this Lexus factory are also 3 holed speakers, inside of a custom speaker din designed by Lexus. Be sure to check measurements before ordering speakers. Max size should be 5.25". Max depth I would guess 3 to 4.5" tops.
Wiring Diagrams (pdf format)-
Radio/CD Changer/Amp: http://www.mediafire.com/file/n2ygzzmzf53/lf1rap96.pdf
Telephone (If needed): http://www.mediafire.com/file/21hoo1hlyha/telephone.pdf