NotFasty

I'm in the process of swapping in LED bulbs and discovered that the passenger rear door light is VERY dim. I've tried multiple LED bulbs and the original incandescent and they're all barely lit.

What's my next step? Attach a multimeter and check current across that socket? Mine is broken, so I need to buy or get hands-on another one.

If a meter reports low voltage... I'm not sure what to do next. Check fuses? I wouldn't think a dead fuse would make one dim...

Thanks.

JLAWS

You might have shorted the circuits out by prying out the old bulbs with a metal screw driver. It happened to me when I made contact with the terminals.
I could not find any bad fuses to change out or a fix online. I just leave the left rear door without a bulb since it stays faintly lit even when I close the door.

Htony

Digital meter is too sensitive which can give bogus voltage reading. Try analog meter liike Simpson 260.

fwhomeboy

Come on MAN!!! Only real Electronics Techs know about the Old School 260!!! Erbody now days got a Fuike 87.

NotFasty

Thanks. I only used my fingers and plastic trim tools. But I'm something of an idiot and didn't really check the bulb before I switched it out, but I don't think the bulb was dim.

I'll try to hit it with a multimeter and/or look for dead fuses. The LS has so many fuse blocks that I was hoping to avoid opening all of them....

Htony

Hi, LOL, I am an old fart. Been HAM since 1960. Worked as RF engineer until switching to systems engineering on super computers. I still use 260. Matter of
fact used it this week end installing motion sensor replacing one 3 way toggle switch. Of course I have some Fluke too. Got an early Christmas gift, An antenna
analyzer made in Ukraine! It is such a time saver I don't need to use noise bridge or GDO any more to work on antennas.It'll save me puch time when I put up
another antenna on the tower spring comes.Season's greetings de VE6CGX.

fwhomeboy

Remember back in the late 70's, setting up and adjusting the SWR'S ON THOSE 19 CHANNEL CB radios.

jmcraney

Seems like there is a component called a Door Light Multiplexer or something like that. I believe the door lights are controlled by solid-state switches and one of those devices has probably been damaged.

There may be some helpful information here: https://www.clublexus.com/forums/ls-...-pls-help.html

NotFasty

Wow, thanks. I did not find that via search. Very interesting. Odd that mine is dim and not dead. I am planning on digging through the fuses one at a time anyway - cheap possible fix. I can't find that multiplexer for my 2012 on Ebay & am not even sure where the part lives inside my car...