Fried my signals and brake lights

How many connections are on the trailer, {what does the plug look like is it} usually you will find a four connection setup, the bottom one , white wire {one by itself with a male connection} is the ground. the next on to that should be brown and that is for the tailigts, next to that a yellow wire, that goes to the left turn signal and brake, the green wire is for the right turn signal and brakes,

mark and disconnect the ones you hooked up. install new fuses. Check each wire on the truck to see what it is for and mark them. Attach each corresponding wire to the plug. after all connected check each wire check the plug. double check the wires. have seen people change plugs and rewire them