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fan controler

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5 years 8 months ago #22904 by bertram1
fan controler was created by bertram1
hi group have a 2004 clk 320 with fan running full speed have both powers and good ground have green and white lin wire need to know best test procedures

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5 years 8 months ago #22905 by John Z
Replied by John Z on topic fan controler
You really need to look at MB service info to diagnose that efficiently and successfully.

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5 years 8 months ago #22906 by Ben
Replied by Ben on topic Re:fan controler
Well you could check coolant temp sensor in data pids and see what the computer thinks it is (maybe it's false high) , or a stuck relay in the fuse box , also a a/c high pressure switch could possibly cause this? Maybe try bi directional controls and see if you can turn it off that would tell you if the control module is in fact controlling it . But you didn't give much information in your post so I may be way off track on what's going on....

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5 years 8 months ago #22913 by Chad
Replied by Chad on topic Re:fan controler
+1 for checking temperature and pressure sensors.
"Knowledge is a weapon. Arm yourself, well, before going to do battle."
"Understanding a question is half an answer."
I have learned more by being wrong, than I have by being right. :-)

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