Run the three-wire electrical cable to the junction box dropping it to the switch. Drop two-wire cable from one switch to the power source.
Make the wire connections at the fixture junction box. Ground the switches to the fixture box. Connect the red wires together. Connect the black wire from the first switch to the white wire of the second switch and wrap a piece of electrical tape around the white wire to indicate it is hot.
Connect the first switch wires. Connect the power supply black wire to the terminal labeled "common" on the switch. Attach the black and red wires to the other terminals. Connect the white wire from the power supply to the white wire from the light fixture.
Connect the second switch wires. Attach the red and white wires to the non-common terminals. Wrap a piece of black electrical tape around the white wire to indicate it is hot. Connect the black wire to the common terminal.
Complete the connections by attaching the black and white wires
how cold is it out?? did it freeze IN the trailer or is it frozen outside trailer? disconnect water supply line from trailer and if it will get to 35 today it will thaw out by itself, and inside turn the heat up and open all doors to underside