U-haul parts suck. Their wiring harness are splice in and run off of the power in your current wiring which is bad. For 40 bucks you can buy a harness that plugs in to ur taillights and has a relay built in. toyota also makes one but its 140 bucks or somethen rediculous. As for the hitch, drawtite is a brand. shop around online. I dont recomend uhaul. their hitch was a pos an 60 bucks more then the one i got.

Welding and Fabrication Engineer
2003 taco V6 ext cab sr5
1988 Toyota Pickup V6(totaled)