asd7l

I just bought my first mercedes (260e, 1987) about a month ago from an auction. I was able to repair the air conditioning but still suffer from a non-functional AUX fan. While the A/C, or engine is very hot, NO power whatsoever is sent to the AUX fan.

Here is a list of all the things i've done:
+ Replaced AUX fan resistor
+ Replaced AUX fan fuse
+ Tested AUX fan relays (All relays related to the aux fan, only 2)
+ Tested power TO the aux fan (No current at all)
+ Tested AUX fan (v12 - v6) - working perfectly
+ Checked visible wiring - Looks good
+ Tested coolant temperature sensor - working
+ Tested Freon pressure sensor - working
+ Tested power to the resistor - no power at all


Any suggestions? I love having the A/C working, but it doesn't blow much cold air when the car is idling haha.

Thanks for reading

compress ignite

I've posted links to Arthur Dalton's diagnosis schemas helping owners
with your problem.

http://www.peachparts.com/shopforum/...problem-3.html

http://www.peachparts.com/shopforum/...inop-e420.html





If you will read through the scenarios in the different posts,your difficulty
will be mentioned and the solution offered.

Plutoe

This is just another misinformation direction of the blind leading the blind.

The OP is spending loads of time and money on items that are not required. What the OP should be doing is learning about the cars system and more specifically the AC system.

After doing that he would learn that the aux fan is designed to ONLY come on under two circumstances--20 Bar or 110 degree engine coolant.

Now he/she /it would also learn that the car has a diagnostic port and the AC system can be checked via pin 7 with a pulse counter and if he got a reading of 34--that indicates a short within the fan!!

All this information is spelled out in detail when you spend the lousy 18 bucks for a 24 hour subscription to WIS---learn about you cars systems and forget the HS!!