Remove rear door speakers from 1990 lexus ls 400

for right now you must disconnect the positive from the battery. After you must call to the locksmith for a new key. see the diagram attached.

Before I post this for you, I just wanted to let you know that you can buy an aftermarket harness that plugs right into your existing harness. Then it allows you to hook up to the wires without cutting your factory wires. They might even have it at Wal-Mart for less than $15. Anyway here are the specs. Don't forget to vote if this helped you out: Car Radio Battery Constant 12v+ Wire: Blue/Yellow
Car Radio Accessory Switched 12v+ Wire: Gray
Car Radio Ground Wire: Brown
Car Radio Illumination Wire: N/A
Car Stereo Dimmer Wire: N/A
Car Stereo Antenna Trigger Wire: N/A
Car Stereo Amp Trigger Wire: N/A
Car Stereo Amplifier Location: N/A
Car Audio Front Speakers Size: 5 1/4′
Car Audio Front Speakers Location: Doors
Left Front Speaker Positive Wire (+): Pink
Left Front Speaker Negative Wire (-): Purple
Right Front Speaker Positive Wire (+): Light Green
Right Front Speaker Negative Wire (-): Blue
Car Audio Rear Speakers Size: 6′
Car Audio Rear Speakers Location: Rear Door
Left Rear Speaker Positive Wire (+): Black
Left Rear Speaker Negative Wire (-): Yellow
Right Rear Speaker Positive Wire (+): Red
Right Rear Speaker Negative Wire (-): White

u will need to remove tires and support car on jack stands under the hood u will find three nuts holding the strut up u can only pull strut off once u hav removed all other bolts from below car... go to auto zone.com and look up repair manuals they will be free after u sign up which is also free

Okay you may want to check to see if the sensor on door lock cylinder hasn't fallen off from the lock itself. Pull of the door panels and check the wires at the door lock cylinder. Hope this helps.

I would inspect your wires at the starter. If you live up north then corrosion is bad, clean all wires going to starter. then clean wires to back of alternator. I seriously doubt that alternator is the problem, but if you remove it you can have it tested for free at most parts stores.

I don't have a 90 LS 400 so I'm not 100% sure this is what the inside of your car looks like but I think this will do it for you: http://www.lexls.com/tutorials/audio/headunit.html

Looks a little intimidating but it's not too bad.  Good luck!

yes, no problem

in 1990 LS400, the amp is only for the sub, its located between the fuel tank and trunk liner. you can reach it by removing the trunk liner which cover the fuel tank right behind the rear seat. hope this helps

the speakers are 4" front and rear doors.