I have a 1990 240 that recently I turned on the air conditioner only to find it wasn't working. Next thing I knew, the windows won't roll down either. Well, it seems that turning on the air caused Fuse 12 to blow. This happens ~2-3 sec after turning on the air. It worked last fall when I bought the car but of course I haven't used it till now.

Any clues as to what would cause this fuse to blow? Also, does anyone out there have a wiring diagram for the air conditioning system for this year & model. It seems that my Haynes manual didn't seem fit to put in the diagram for the air conditioner wiring. I pulled one from a green book for an '85 but I suspect my wiring slightly different.

 

Here ya go,enlarge it with windows photo viewer.



Dan

 

Unplug the A/C compressor and see if the fuse still blows.
I have seen alot of cars where the clutch on the compressor goes bad and blows the fuse.

 

Thanks Turbo245, but I tried to zoom up the diagram but it comes out too blurry to read. Any chance to get a higher-rez pic or pdf?

 

I looked in your profile and didn't see a e-mail address.PM me your e-mail and I'll send you a complete wiring diagram for your car.



Dan

 

Thanks Dan for the help. One more thing, where is the solenoid located in the vehicle? I am running too much current from the AC switch to the pressure sensor & solenoid. I can disconnect the pressure sensor but I still blow the fuse. I am suspecting the solenoid but I don't know where it is located.