Why Cooling fan shorted fuses often?
My 97's 318i cooling fans got this problems many times. When it burned the fuse, it could not cool the radiator and caused the radiator to burst TWICE. I had to replace two radiators already!!!
In April, after it burned the fuse and burst my 1st radiator, I thought it was because the fan's wore out, when it kicked in, the fan's motor held too tight and caused the current to be too high, then burned the fuse. So, I bought an used fan to replace it, which ran much smoothly than the prior.
But last week, it happened again! I firstly replace the original 40A fuse w/a 60A. Then, I took the fan out, plugged it with the battery, both hi & low speed could run and seemed to be pretty good. Then I put them back again and test it. After the temperate's high enough, I smelt something's wrong and saw smoke coming out. I found that fan's motor was burned to red.
What's wrong? I have to check the whole fan circuit? How to do it?
Your ideas will be highly appreciated!