[LeftCoastGeek]

the new-to-me 1993 300CE (Cabriolet) dome lights don't seem to shut off if you put them in automatic mode. I've yet to investigate farther, but I wonder if anyone else has dealt with these, and repaired them? it appears the timer circuit is in the dome light assembly, and the assembly is a $500 part (OUCH), so I'd rather repair it than replace it. I replaced the one on my volvo 740, was only about $100 for an updated style that was interchangable with my older style.

now, I'm not above rewiring it to be timer-free if I can't fix it properly (and as an electronics geek, I'm pretty good with that stuff)...

 

[LeftCoastGeek]

ok, more testing has shown...

if they are in automatic, when you start the engine, they go off.

but, if you open and close a door, they never go off.

that tells me the timer circuit is fried.

maybe I can rewire so there is no timer, door closed, lights off.

 

[Real1shepherd]

A cab might be different, but in the wagons, sedans and coupes the seat belt warning light, all door convenience light functions and reading light are controlled by the overhead unit...along with a sensor for the sampler fan. If you take the unit apart, it has several IC's in there. Best is to find another in a JY and sub. They are crazy expensive new, OE.

For example, my puddle lights in the front doors work, but the overhead light for the front doors do not. Yet the back interior lights work in the wagon as they are supposed to. Both overheard lights will work if you switch to them manually. Bad overhead convenience module.

Kevin

 

[LeftCoastGeek]

the cab has a completely different one than the sedan/wagon, it has a reading light on each side, and no 'main' light, with two 3-way rocker switches. left switch is 'door/automatic mode', 'off', and 'both on', while the right switch is left light, off, right light. I don't know if this is the same as the coupe.

my door puddle lights work fine. if I switch it to auto mode, and open the door, the lights come on, but they never go off after closing the door. they do go off if I start the car.

 

[Real1shepherd]

Even though its a cab, you're gonna have a small convenience module somewhere controlling the light cycle. Does the cab have a sampler motor?

Kevin

 

[LeftCoastGeek]

near as I can tell, the dome assembly light on the cabrio has the timer function AND the climate control sampler motor integrated.


The cabriolet dome light assembly is module E15 here, 24823200.pdf

E15m1 and E15b1 are the sampler motor and temp sensor afaik.

 

[Real1shepherd]

What controls the seat belt light? I see it now....

Kevin

 

[LeftCoastGeek]

cab has its own custom seat belt module 2491400.pdf

(N42 is the SBE - seat belt extender - module, while N2/4 is the seat belt warning module)