Looking for some help and advice here.

I have a 3 horse Bison trailer which I like very much. It is a 2001 and I bought it used about a year ago. It has electric brakes. My problem....the brakes squeel very loud after they get warmed up. I thought the problem was the pads, so I replaced the pads with brand new ones. I have cleaned them and adjusted them several times. The rotors appear good. Still the loud squeel when braking. The hotter they get, the more they squeel. It is not like I am overheating them, even on flat easy travel, they seem to start making noise after about 20-30 miles. The brakes work fine, I just sound like a fool when I stop at a light and I sounds like and old dump truck coming to a halt. Also, any advice on adjusting them to ensure I am doing that correctly is appreciated.

Please let me know if anyone has some advice. I do truely appreciate your assistance.

At least you know when they are working..

MLfighter .. Welcome to the forum ..

I have two suggestions...  (I'll assume you have drum brakes although you said rotors) 

Either turn the drums or use some abrasive cloth to deglaze the drum surface.

Grease the brake shoe contact points on the backer plate.  As the brake shoe vibrates, it is transmitted to the backer plate.  If the shoe contact points are lubricated, the noise is damped instead.

Thanks Hosspuller! Yes, I have electric drum brakes on both axels.  

That is some great information. Could you tell me wore about turning the drums? Do you mean have them done on a machine at the auto shop? They look pretty good, but I am not sure how to recognize the glaze. How much can I get in there with abrasive cloth? Is there anything else I can use like steel wool or fine sandpaper?

How about grease, white lithium or axle/bearing type grease?

Thanks for the help!!! 

The glaze is a smooth finish on the brake drum surface.  I imagine the smooth surface allows the brake pad to grab & slip in rapid cycles... producing the squeal.   Sorta like rubbing a wet finger on the rim of a glass.  The ultimate refinish is a shop using a lathe to cut the surface of the drum to fresh metal.  I suggested the abrasive cloth as a possible cheap fix.  You're trying to remove burnished metal and produce a comparatively rough surface.

As for grease on the backing plate.  Either type you mentioned will work.  I use Loctite C5-A anti-seize.  It doesn't melt and run when hot.  If you use grease, apply it very sparingly.  You don't want it to melt & get on the brake pad or drum surface.

Great info Hosspuller!  Thank you very much. As soon as it gets lower than 110 degrees here in the central valley of California, I am going to work on it!

Take great care....