Have you pulled the relays to see how wet the contact pins and plugs are? I would pull each one, blow out the recepticle with your compressor, then grease the plug really good with electrical corrosion grease.. same with your fuse panel if it's wet..
SOURCE: 03 Audi A4- Coolant fan runs until the battery dies
What does the fan do when you restsrt/charge the battery? Start up again? Replace the sending unit, or unplug the sending unit first. If fan keeps running, the relay is faulty.
if it stops, the sending unit is at faulat. good luck
SOURCE: location of the audi a4 fuse box 2003
Driver's side at the end of the dashboard, a plastic panel "D shaped" between the door and dash. Pry off carefully if it's cold out.
SOURCE: audi a4 mixing water and oil together hissing,grey/brown foam
Just went through the whole process changed the head gasket and still got oil - thanks to guys on the forum that said there is no other way besides the head gasket, went to an audi mechanic and he just laughed, he said 99% of the time it is the oil cooler. He was right.
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