problems with taillights on 93 splash

i have a 93 ranger splash. the turn signals started blinking fast the other day, so i figure the flasher needs replaced. i also noticed that when i hit the brakes, the amber turn signal lights also come on. any suggestions would be appreciated.

i found out what the problem was and fixed it. the aftermarket trailor wiring kit had a short and a bad ground. after checking it further i figured out that it was the wrong plug to begin with. the previous owner had it installed about 3 years ago. he told me that the truck had always done this when pulling a trailor. when it started doing it all the time i removed the wiring kit and have no problems now.