How do you hook up your trailer lights to your 91 4runner?

Answer 1

I wanted a clean installation without any wires hanging down by the rear bumper.

To achieve that I removed the drivers side rear tail light and tapped into the lighting system in the tail light assembly cavity. Then I drilled a hole through that compartment

(one on either side of cargo space in rear of 4 runner) that is used to store car jack parts and whatever else you want to store. I then fed the new trailer light wires (3') through that hole and sealed the hole with silicone.

Then I attached the trailer 4 prong plug in to the newly installed 3 foot long wires,

and wrapped all the wires in red plastic tape, coiled it up, put it into the side compartment and reattached the compartment door.

When needed I drop the rear door, open the side compartment and pull out the wire.

Then I feed it between the rear fold down door and the bumper, paying out the right length of wire to reach the trailer receptor, then close the rear door. There is a rubber moulding around the rear door that compresses around the wiring holding it in place

and preventing it from being crushed.

When trailering is completed, open rear door, pull wire back into vehicle, roll it up and store it in the side compartment. This works wonderfully well for me and I never have that ugly wire flapping in the breeze and deteriorating in the elements. Good luck, Dan.