asd123

Last Thursday morning, I started the engine of my car(Nissan Maxima,1992) and pushed on the three switches to defog all the windows and outside mirrors. After I cleaned the ice on the windows(about 10 minutes), I found the engine stoped. I asked one Petro Canada garage nearby my apartment to take my car. They said that they found the fuse burned out. They changed it and it burned again. When they changed the third one, my car worked very good like a new car, they said. After they checked 5 hours, wanted to find out the problem, but they found nothing wrong. They charge me $150. When I first started my car, it worked well. but after half an hour, when I started the engine and pushed the three switches on, the fuse burned again. I have to leave my car in the garage.
请教各位高手:what's the reason that the fuse burned again and again?Thank you very much!

eedward

what's the fuse?