Instrument cluster not working - help me finding a problem

[Ignas.quattro]

Hello all fans!
I apologise you all , for me always writing in English here , not in English section... Here I get more answers , or at least I hope to.
I really hope that you will look into my problem and help me finding a solution!

I have a problem , or , well , I made it myself when I wanted to connect an outside temperature display to my speedo(the one that goes below boardcomputer. My instrument cluster originally didn't have it as far as I know. I had a picture of the table with all the meanings for every needed wire but I didn't need it as I found the needed connection port which was already there , just packed into some fabric. I connected the display and nothing happened , it didn't show anything , only the light came on , but not a very strong one. For sure , I don't know if the display works or not. Then I saw this red connection port with blue-black wire , hmm , two of them coming into one , the same wire goes into the connection port of the display. According to the given table , it is Main Feed 12V. I somehow decided to put a 12V wire(from illumination feed elsewhere) and see what happens. And so It happened - my whole instrument cluster doesn't work anymore - tachometer , speedometer , fuel gauge , voltage meter , oil pressure , temperatures ,autocheck , boardcomputer - everything stopped working except for the clock and illumination. I checked some fuses under the hood , but they all seem to be fine. Fortunately I had another instrument cluster as a spare , it was 99% working , but It was the same when I connected it.
Here are all the connection ports:

Here you can see that the connection port I found is exactly the same needed to connect the outside temperature display:

[level44]

Good Morning (just Moin)

KI-Stecker.jpg

für die Aussentemperaturanzeige wird ein Kabel zum Temperaturfühler vor dem Kühler (Radiator) benötigt ...

wenn der gelbe Stecker bei Dir schon vorhanden war, ist auch der Anschlussstecker für den Temperaturfühler im Auto vorgerüstet und kann ohne gefummel eingesteckt werden ...

die 2te leitung des Fühlers kommt im Motorraum an Masse ...

verbaue einen zusätzlichen Fühler (zum schon verbauten wenn Klimaanlage ab Werk vorhanden) den Du an der Strebe vor dem Kühler befestigen kannst ...

read here

outside temperature for a cable to the temperature sensor against the radiator (radiator) needed ...

when the yellow plug with you was already there, is also the connector for the temperature sensor of the liquids in the car and can be inserted without fumbling ...

the 2nd line of the sensor in the engine comes to mass ...

obstruct an additional sensor (to the already built-up air from the factory if any) which you can attach to the strut front of the radiator ...

Greeting Uwe

[Ignas.quattro]

Thank you Uwe ,but the traslator doesn't work very well , as it is quite hard for me to understand...
Let's leave the temperature display for a while. Now I need help to find what went wrong and why my instrument cluster is not working. I put an illumination 12v feed from the illumination of cigarette lighter near radio and then something wrong happened. Please help me! I checked all the fuses under the hood - they are fine

[level44]

How did you attach it? from the red plug to 12V cigarette lighter??

[Ignas.quattro]

Ok , the problem is solved. Me , being a total idiot , missed a burned up fuse Now I changed it and everything works. So let's get back to the outside temperature display. If my car had that yellow connection port , do I need to do something more than just connect it?

[level44]

der gelbe 5-fach Stecker ist klar ... war er schon im Auto ?

wenn ja, liegt unten beim Relaisträger noch ein gelber Stecker, 1-polig ...

dieser ist für die Signalleitung des Temperaturfühlers, Montage vor dem Kühler ...

der Temperaturfühler ist 2-polig, eine Leitung auf Masse und eine Leitung zum gelben 1-poligen Stecker ...

der gelbe 1-polige Stecker für den Temperaturfühler ...

without many words ...

▼

ATA nachrüsten.jpg

Greetings

[Udo-TQ 44]

Hello ignas!

You have to connect the yellow plug only, open your engine hood, take out the plastic hood from your radiator.
In front of it is a diagonal strut, on it is one temperature sensor. You have to install a second sensor there and search for the preinstalled connector...
The second pole of the sensor must be connected to ground.

Greetz to lithuania, Udo

[Ignas.quattro]

Ok , thank you very much for all the information! Looks quite simple - just have to buy another working sensor from a parts car and connect one wire from it to the body and another to this one-pin yellow connector , where the signal wire is. By the way , where do I start looking for it?
By the way , since I don't have another sensor yet , can I connect that 5pin yellow connector to the display and assemble the instrument cluster with everything around it? I mean , will I need to do anything more there? Don't want to do all the bolt screwing and steering wheel removing more times then I need to

P.S. Is it normal , that my display shows absolutely nothing now?

[level44]

Signalleitungsstecker.JPG

the yellow plug with purple identification is to find somewhere there… Cable color brown/yellow


PS: You ought to three points after ca-40 - 50 sec. see ...

in the absence of the temperature sensor ...

[Ignas.quattro]

Signalleitungsstecker.JPG

the yellow plug with purple identification is to find somewhere there… Cable color brown/yellow


PS: You ought to three points after ca-40 - 50 sec. see ...

in the absence of the temperature sensor ...

Ok , thank you , I will try to look for it.
By the way , with no sensor , when I turn on the display , after 40-50 seconds I should see some three dots or something?

[level44]

You see in my Audi B4 without temperature sensor after 58 sec.

▼

ohne Temp.-Fühler.JPG

[Ignas.quattro]

Aaa , this is how those three dots look like.

Unfortunately , even after some driving , I only see , hmm , nothing , just a very little light... Maybe mine is not working? And I also looked for that one-pin connector in yellow and pink colors - didn't find it... Only a one-pin connector with green and pink colors

[level44]

Moin

when the yellow 1-pin is not available ...

or you do not find him ...

pull up a cable from the temperature sensor to the 5-pin yellow ...

clamp the cable directly to the cable brown / yellow ...

then ...

screw on the display and check the soldered Lamp ...

I think you need to replace them ...

Code: Alles auswählen

wenn der gelbe 1-polige nicht vorhanden ist ...

oder Du ihn nicht findest ...

ziehe ein Kabel vom Temperatursensor bis zum 5-poligen gelben ...

klemme das Kabel direkt an das Kabel braun / gelb ...

dann ...

schraub die Anzeige auf und kontrolliere die eingelötete Lampe ...

ich denke Du mußt sie ersetzen ...

[Ignas.quattro]

Thank you , I will do that!

Except for changing the soldered-in light , which seems to be turning on when I connect the 5-pin yellow connector