2jzcoupe

I have a ucf20 I have replaced every interior bulb with quality Bright led's. What the problem is when I open the door only the dome light comes on normal I know. I want to open my door and have all the map lights and dome light come on front and rear. Can this been done?
I searched lots and found nothing.

Thank you for any help.

RA010623

iTrader: (1)

i think only way to make them all turn on is do alot of wiring and wire lights to get power when you open the door

RA40

iTrader: (6)

Can be done, you'll have to jumper those to the wiring with the courtesy light harness. You will lose the map light function unless you use a relay so that they are dual purpose.

If you are motivated, you'll be the first one here to have done it. Take notes and pictures for us and I'll put it in the FAQ. Others may want to do this as well.

PureDrifter

iTrader: (10)

UCF20=95-00, you really need to post which year you actually have.

2jzcoupe

its a 1996. I am going to look at the wiring diag tonight maybe I can trick the body control module to think all doors are open if any are opened.

2jzcoupe

If someone has a online Diag for this circuit i should be able to fig it out.

2jzcoupe

After tracking down a Diag of the multiplex communication system I think I know how to do this.
I have some testing to do but all the lights are grounded from 3 different ecu's. The body ecu, driver door ecu and front passenger door ecu. Both rear courtesy lights get there ground from the body ecu that is what turns the light on since all lights have a constant power from the dome light fuse. I want to try and jumper all the grounds together so when one gets ground it grounds the other three also. I just don't know what this will do to the ecu if it will like seeing a ground to wire that its not giving grounds to.

2jzcoupe

On the Body ecu if I jumper from pin 8 connector D to pin 20 connector B to pin 2 connector B I will try this on monday that should turn on the rear two lights and the dome light.