I have a 6x10 utility trailer and just switched from regular tail lights to LED lights and everything worked fine with the regular lights, I switched the left one first and checked all the functions and it worked great, switched out the right one and now when I check both turn signals, and the hazzard lights they flash very rapidly and are slightly dimmer, what happened? Thanks.

You vehicle may be telling you it thinks there is a burned out bulb. The LED lights pull a very small current.

Try wiring the bulb you took out, parallel to the LED. If the flash rate is normal, then the low current draw is the problem.