How to Install Adapter 4 Pole to 5 Pole Trailer Wiring Adapter # 20036 on a 2007 Toyota FJ Cruiser

Question:

I am looking for a replacement pig tail to plug into a 2007 toyota fj cruiser it is wired to the back and has a square plug if i remeber correctly and need the short pig tail to plug into that and go to a 5 flat? thanks

asked by: Richard

Expert Reply:

What you will need to go from the 4-Way flat on your Toyota FJ Cruiser to the 5-Way flat on the boat trailer is a 4-Way to 5- Way adapter. You can either use # 20036, or # 47515 (shorter). The 5-Way end of the adapter would plug into the 5-Way on the boat trailer. The other end would plug into the 4-Way on the vehicle. The extra blue wire would need to be connected to the reverse light circuit behind one of the taillights. This circuit is used by the trailer side to engage the electric reverse lock out.

If it is needed for brakes, the blue wire would have to be routed to the cab of the vehicle and connected to the blue wire on a brake controller. If the vehicle does not have a 4-Way connector but the wiring is present at the rear of the vehicle, you would need to test the wires for function using a circuit tester like # PTW2993. The 4-Way end you need to be clipped off and the wires on trailer harness spliced to the vehicle wiring as follows:

White is the ground (could be attached to vehicle frame)
Brown is for running lights
Yellow is for left turn and brake light
Green is for right turn and brake light
Blue will be attached as descried above

I have included a link to a video showing a typical installation of Adapter 4 Pole to 5 Pole Trailer Wiring Adapter, # 20036, for reference.