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2G Defroster not working.

thuddor

Probationary Member
9
5
Jan 15, 2023
Bucharest, Europe
Hello!
My rear defroster dont work. The button light up, but nothing happen on the rear windshield. I checked the fuses, but they are allright. I tested the connectors on the windshield and there is a short somewhere.
My question is where do I have to look first in order to fix it?
 
Last edited:

Phantomdmod

Supporting Member
35
42
May 24, 2019
Switzerland, Europe
The connectors on the windshield should have a short circuit.
Its a heating coil.
Check if you have 12V on the connector when you turn it on.
The other side needs a ground connection.
If you search for a cut in the heating line, you can put a white sheet of paper on it and a bright light from the other side.
 

Phantomdmod

Supporting Member
35
42
May 24, 2019
Switzerland, Europe
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Connector E10 needs 12v when the switch is on.

If you dont have 12V then the switch is bad or the relay or the fuse or the wire.
You have to check on by one.

You said fuse is good, did you check with resistance?

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Defogger Relay is B67 under the steering wheel.

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Here is the plan , wire color is for example B-R (Blue line with a Red stripe)
The Numbers in the circle like E-14 are connectors, after every connector the color of the wire can change 😉.
 
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