My fan does not work

Question

on my dell 4F343 the fan stopped. if you tern the laptop on its face that the bottom is facing up. on the left top corner. i did see that you must strip the whole laptop just to gen this information: rev:3APanasonicudqfzpho1cqudc5v 0.15a2zo4cit got 3 wires: brown black redplease can you help