How to Hook Up Two Lights on a Motor Home

Disconnect the positive terminal of the battery, using a wrench. Strip off 1/2 inch of insulation from the tip of a red and a black wire, using a wire stripper. Crimp an eye terminal on to the tip of each wire, using pliers. Cut the red wire 3 inches from the eye terminal with diagonal pliers. Splice each end of the cut wire to each wire on both ends of an in-line fuse holder, using a solderless insulation displacement connector.

Bind the red wire to the positive battery cable of the 12-volt coach battery, then bind the black wire to the negative battery cable, using cable ties. Run both wires along walls, ceiling or underneath carpeting from the battery to the 12-volt switch, then cut the red wire once it reaches the switch.

Strip both tips of the cut red wire by 1/2 inch, then crimp a spade connector on to each wire tip. Plug each spade connector to each of the two terminals behind the switch. Run the black and the red wires from the switch to the terminal screws on the first light fixture. Cut both wires once they reach the terminal screws, and strip off 1/2 inch from the tip of each wire.

Run a new segment of a black and a red wire from the terminals of the first light fixture to the terminals of the second light fixture. Strip off the insulation at both ends of each new wire by 1/2 inch.

Strip off 1/2 inch of insulation from both ends of a 6-inch-long red wire, and a 6-inch black wire. Wrap one end of the black 6-inch wire around the negative terminal screw on the first light fixture. Wrap one end of the red 6-inch wire around the positive terminal of the first light fixture. Tighten both screws firmly with a screwdriver.

Hold the tip of the red wire running from the switch and the tip of the red wires running from both the first and second light fixture, then splice these wires together with a wire nut. Follow the same procedure to splice the black wires.

Wrap the tip of the red wire running from the first light fixture to the second fixture clockwise around the positive terminal screw on the second light fixture. Wrap the tip of the black wire running from the first light fixture to the second fixture around the negative terminal screw on the second light fixture.

Loosen and remove the lock nut on the positive and on the negative battery clamps. Slip the red wire eye terminal on to the bolt on the positive terminal clamp. Slip the black wire eye terminal on to the bolt on the negative terminal clamp. Tighten both terminals firmly. Open the in-line fuse holder, install the fuse, then turn on the lights to check if they are working.