Alfa GT fuse F31 burning constantly
My GT (2.0 JTS) has been bit problematic this winter. Heater is not working, had it checked at local workshop, they found that Fuse F31 was blown but at that point the fuse didn't blow again, so they were unable to find the reason for it. I paid 80 € for fuse change, so at this point I'm not keen to take it back there, afraid the result is the same, trying to find the reason for it first.
In a warm garage it works fine as long as I've tested it but when I drive it out, after random time it blows the fuse. At some point it lasted even 10 mins, the 2 mins, then it blew it right away after turning the key. If it doesn't blow right away, haven't been able to find what event triggers it. It seems either cold (Finnish cold, its been around -20 C for past month), gear change or tremble from driving blows the fuse, or something else. I've been excluding various reasons for this, it is able to blow the fuse even when the heater motor, seat heaters, cigarette lighter and various other parts has been disconnected. In a other tread quite similar problem was due to moisture in body computer, so I opened it also but found no reason/problem inside.
Probably there is a faulty wire somewhere connecting randomly to the ground, unless someone has a better suggestion? Any suggestions where to search for the short circuit?