[Audi A4 B5 FL] - Interior lighting flashes when the passenger door is opened

Hello, I saw that there is a similar topic but it was closed, hence I write a new one.

The patient is A4 B5 FL 2001
The problem is the flashing interior lighting when any passenger door is open and the ignition position, although sometimes without ignition it can flash rhythmically. By opening the driver's door, the lighting stops flashing and is lit normally.

Checked and cleaned contactors in the door of the driver and passengers, plugs cleaned at the left and right pillars.

The problem disappears after removing the 382 relay, but then there is no lighting of the legs and door lamps.

I will add that when the relay blinks and ticks, from the trunk lid, the servomotor from the central seems to buzz to the rhythm of the blinking, disconnecting the mass at the post, the servomotor in the flap begins to buzz very much, something like a welder.

Does anyone know where to look for the problem here? I will replace the central pump, but I can't find exactly the right one, they have older models everywhere.

b5 fl no longer has a central pump, only everything electric. If so, you have water in the comfort module.

The central pump is in FL, the electric is in VW, there is no water anywhere, I also looked at the plate if there are no cold solders but you can not see anything.

I just don't know why the module feeds the mass to the relay as if pulsating, once it is and it disappears all the time, which causes the light to pulsate.

Haven't you put in a counter with audi A6?

Not everything is original, nothing has been changed or bred, except that I am only able to re-iron or replace the central pump.

And fis displays each of the doors? If you have a full fis, disconnect the gray cube from the meter and see if it is still blinking.

Hey, yes FIS normally displays each door separately, all the microswitch in the door are functional, everything works and indicates as it should except that the lighting is flashing. Thanks, tomorrow I'll try to disconnect the cube and see what it changes. And why do you suspect a meter?

Somewhere you have poor weight, sure.
The signals also go through the meter, if you checked all the rest then it would be useful to eliminate the clocks. I suspect that if you change the pump, it won't change anything.
We have processed so much with a friend that he had an accurate fis and rectifier diodes had to be given to the counter signals from the door.

Gentlemen, has someone solved this problem? Because I have been struggling with it for a few days and the only thing left for me is to replace the pump / central module.
The illumination only flashes when the right front passenger door is opened with the ignition key turned off.

Ok thanks but I've already read this topic. For me, the problem is evidently low weight, but not at the end of the right front passenger door, but somewhere further in the installation. I tried with rectifying diodes, I gave the mass directly to the gray cube meter pin and the info about the open door shows on the FIS, so it's not the meter fault. I cleaned all the cubes from the switchboard, and also those on the back of the pump. I have not checked yet if there is a mass on pin 1 of the green cube after opening the door. Interestingly, when I gave the additional weight through the diode on the meter pin, the backlight stopped flashing, but after closing the door, the lamp under the legs went out and the one on the headliner did not.

Hello, I will describe what was with me, although the car was sold a long time ago, namely, after removing the clocks, it turned out that one pin in the clocks was bent, someone had to disassemble the clocks and bent the pin when plugging in the plug. Correcting the pin solved the problem of blinking lighting.

The car was freshly bought and the dealer was probably rummaging around there, maybe something with the mileage, but after that the problem resolved.

I've figured out more or less what's going on. There are 2 microswitches in the lock's end, but why 2? I played with them and it turns out that 1 is from the signal for lighting the legs and 2 is for the inf. about opening the door for the interior lamp. These signals (mass input) must coincide with each other, otherwise the relay goes crazy with the interior lighting. As if the first 1 micro gives a signal to open the door directly to the relay, and 2 goes through the central controller, i.e. a pump. So, to sum up, 2 microswitches must be operational. Moreover, the meter goes to 5 different signals, PP, LP, LT, PT door opening, boot lid opening
and 6 bridged signal to open all doors. The 7th signal is the bonnet flap opening, but it is only needed to clear the message about the low oil level in the engine. Translating into simple language, the lighting lamps do not care which specific door we will open, it is important that the lamp comes on after opening the door, the signal goes from the central pump to the relay and the meter, while the signals about opening the secondary doors go to the meter separately and also through the lighting relay with the distinction between the leg illumination lamps.
For me, not 1 of the microswichow was leading, but too "weak", hence the 0 1 signal was not always correct.