I've found little to no accurate information out there on the wiring for the HiHy for trailer lights, so I've decided to put this out there to help.

After installing an after market hitch on this vehicle (amazingly easy), I started the search for the correct wiring for the trailer lights. I pull a simple, but stout 5'X8' trailer for mulch, compost, rocks, etc. The wiring was nothing but simple at the beginning - partly due to varying manufacturers' literature that hasn't been updated. I know the HiHy comes standard with the towing package (only includes wiring and transmission cooler according to Toyota). No one could find the connector at the hitch places. The two dealers I called said I would need two parts; one $60 and the other $50. This sounded rediculous to me since it was supposed to come with the towing package (again standard only on the hybrid model).

To make a long story short, I was able to get a single plug wiring harness for about $25. With a little persistance from a local trailer hitch installer, we found that a Draw-Tite 18248 works perfectly for the HiHy. Draw-Tite's book calls for a different number, but the tech at the hitch installer knew the right person to call at Draw-Tite. They confirmed the book was incorrect for the Hybrid model even though the book said it included the Hybrid. Draw-Tite said they were getting several calls on this. It took a week to get an answer, but Draw-Tite recommended the above stock number and it does fit the connector perfectly.

To find the factory tow harness connector you will have to open the rear cargo door and look under the driver side storage tray. You will have to remove the door threshold, tire tool tray, and then the rear driver side storage bin. This is by far the hardest part. Removing and reinstalling that tray is royal pain in the rear. Underneath this bin you will find several connectors that could potentially be the one. Look closely, there will be a large off white rectangular connector covered in a grey foam protector. This connector will most likely be hiding under one of the wire harnesses, so you will have to look for it. It helps to have the above harness with you when you do this. Plug this in, unravel the wire and route it to where you want it and you're done. Well, except for putting everything back where it belongs (and bolting down the ground wire).

All for about $25.

By the way, all of the wiring harnesses come with instructions and pictures, but they aren't completly accurate.

I hope this curbs the frustration for others.

Anthony