Hi Ladies and Gents

Does anyone know where the interior light delay module is located on the 91 LS400? I recently shorted the cigarette lighter accidently. I replaced the fuse for the lighter but the interior light won't work on "DOOR" anymore. I don't have footwell or ignition courtesy lamps either.

Any ideas?

Cheers
PSLS400

 

Have you checked the switch on the door? The courtesly light switch that lets the car know if the door is opened or closed. Those have know to go bad on the 1st gen lexus and they will keep your courtesly lights from working if the switch isn't picking up that the door is open. You can test it by opening one of the back doors or passenger door since they receive less use and last longer.

 

Thanks for the advice.

I'll give it a try and let you know the result.

Cheers

 

Maybe it's the obvious....have you checked to see if the bulbs burned out?

 

Fellow problem-busters

The plot thickens. The door panel lights work and turn off when I press the door switch. The interior dome light works on the ON position but not on DOOR. I do not have any lights in both passenger and driver's footwells nor the ignition courtesy lamp. I've replaced all bulbs but the problem persists. It seems that this is something a little more complex. Interior light delay module or something else?

Spent most weekend stuffing around so am getting a little &*%$#?! off!

Ciao
PSLS400

 

Well now it is 2005 and I have the same exact problem. I shorted out the floor curtesy light while changing the bulb. Now I have the exact same symptoms!

I suspect the time delay module got fried. Any one BTDT?

 

Ok , I traced the problem to the Integration relay. Left side of the steering colum. Anyone knows how to reach this reay? Looks like it is above the fuse block..

 

Interior Lights Go Out , And Something About The Tilt In The First Gen Ls.
Mine Started To Act Up But Only When The Moon Foor Was Open.
Some How There Is A Multifunction Relay Switch That Is Above The
Rearview Mirror Just To Left. I Traced It To A Bad Window Motor.
It Took Up Lots Of Time And A/c.

 

Hi,
Just posting the solution to the interior light problem.

The integration relay is above the interior fuse panel. It is a $230 oem part. I took it apart and found a burnt resistor. It is a 1 ohm 2amp resistor (20 cents). Soldered it in and everything works.

This problem is rare.

Good luck everyone!

 

Super old thread I know, but I want to go on record stating that I had this exact same problem. Had a slightly less used relay to replaced the cooked one with, and the battery drain went down to 0,045A and courtesy lights started working as they should.


Rootcause: Door switch was a bit wonky on the drivers door, which must've overcooked the relay to the point where it drew 0,8 amps at all times.
Also the alarm randomly went off, and the courtesy lights had a habit of staying on for extended periods of time.