Hi,
I have 93 240 wagon.
When I bought my 240 wagon last year, Passenger side power window didn't work at all. I was disappointed but try to not think about it for a while...
Then I was keep working on brake recently, I disconnect negative terminal at battery for a while then connect back, window start working......

Now sometime all window doesn't work.
I keep disconnecting battery negative terminal, wait for 30 minutes.
Connect negative battery terminal back, Window work again.

Does anyone tell me what is wrong and how I can fix it?
I don't mind carry 10mm wrench battery terminal each time but i also need to adjust clock each time

Thanks!
tat

PS/ sorry I type 930 instead of 93

 

I'd change the relay; may be it gets hot and causes this... Or it is some wiring short problem.