Alarm and dash problems

My windshild wipers stoped working. So a friend of mine looked behind the passenger seat fuse box and said I needed a fuse one was missing. It didnt make since 2 me because my wipers worker before without the fuse. But he gets a fuse of his anyway and puts it in. Saying it wouldn't hurt. Now my alarm goes of randomly, my lights flash, and dash says "displays defective visit workshop", "brake fluid visit workshop." I had to disconnect the battery because the alarm went of all night. Whae can I do? Please help